Sending Control-Z to Input Stream

Hi everyone,
I'm writing an interface to a command line program, and
one of it's features is that it will accept "forms" through
standard input. The default is that notepad will open
when the command is typed, and you can edit the form
through there.
To accept the form through standard input, you have to
send it the form, and then tell it the form is complete.
This is done using the CTRL-Z keypress, at least when
typing the form in with the keyboard.
I need to do this with Java.
There is another post which poses the same question at
http://forum.java.sun.com/thread.jsp?forum=1&thread=3050
so I attempted that solution.. and that didn't work.
I had the system print out the form as it was being written,
and the form displayed properly, followed by what was
supposed to be a CTRL-Z character, which appeared
on screen (DOS Window) as an arrow pointing right.
Here is the code constructing the form and adding what i've been told is "ctrl-z":
new StringBuffer(form+System.getProperty("line.separator")).append(CTRL_Z).append(System.getProperty("line.separator")))CTRL_Z is defined as:
public static final char CTRL_Z = 26;Does anyone have any other suggestions that might be able to help me?
If you need more information/code provided, I can do so.
Thanks for any help!
Kefka.

You can't actually send anything to an input stream. But let's suppose you have an output stream somewhere that is connected to the standard input of this command line program. Try sending a byte, not a character, that contains 26 to it (yes, ctrl-z is indeed 26). This has a better chance of working than the character idea, because Java is going to translate your character-26 from Unicode to bytes using your system's default encoding. And I can't predict what that might end up as. But it will leave the byte 26 alone and just send it... I hope. Can't guarantee this.

Similar Messages

Set the max bytes per packet for an input stream

Hi,
I got this problem:
I want to store some images into a DB. Now if the images are huge, the DB told me, that the packet size is too large
maybe like that : 'Packet for query is too large (1668641 > 1048576)'
I use an ByteArrayInputStream for the transmission to the DB.
So if I am not able to set the max. packet size of the DB is it possible to cut the input stream into pieces to send them to the DB ?
regards,
Olek

None of this makes any sense.
The MySQL driver will be using TCP to talk to the database server. TCP is a stream oriented protocol. You can't control the size of the packets (other than the maximum by frigging with OS settings - don't do that). Neither can the server detect the sizes of incoming packets. It just sees a stream of bytes and has no idea where the write() boundries are or how the TCP protocol split that into IP packets - it's just a stream of bytes arriving in the same order they were sent.
And... the max TCP segment size is nowhere near 32Mb, so that doesn't make any sense eeither.
So, I conclude (especially in light of the answer about the config settings) that "packet" is a badly abused term by MySQL that allows it to limit the size of individual requests in order to provide some kind of protection against badly written clients and/or malicious attacks. If you need to send more data than this, just up the limit - especially if this is an intranet application where the client is under your control and attacks are unlikely.

Document file or input stream is not set.

Error sending mail :Exception Thrown
oracle.apps.xdo.delivery.DeliveryException: Document file or input stream is not set.
at oracle.apps.xdo.delivery.AbstractDeliveryRequest.submit(AbstractDeliveryRequest.java:1154)
Delivery manager:
Can some one tell me what was wrong with this,
I check my document path I can describe it
When i send one attachment it works with the same path
but when I use multiple attachment it gives then error
Attachment m = new Attachment();
m.addAttachment("/fapps/oracle/fintstcomn/java/chami/test.pdf","test.pdf","application/pdf");
m.addAttachment("/fapps/oracle/fintstcomn/java/chami/test2.pdf","test2.pdf","application/pdf");
delReq.addProperty(DeliveryPropertyDefinitions.SMTP_ATTACHMENT,m);
Thanks

Ok. What I needed to do is use the Bursting Engine to send out an email (list of invoices) to sales reps for our company. From what I read I have created an XML Document (Template) and have successfully ran that but it looks like I need to create a control file(bursting)? This control file would need to be saved as an XML? Is this correct?

When using URLConnection read input stream error

hi,
In my applet I build a URLConnection, it connect a jsp file. In my jsp file I refer to a javaBean. I send two objects of request and response in jsp to javaBean. In javabean return output stream to URLConnect. At that time a error happened.WHY???(Applet-JSP-JAVABean)
Thanks.
My main code:
APPLET:(TestApplet)
URL url = new URL("http://210.0.8.120/jsp/test.jsp";
URLConnection con;
con = url .openConnection();
con = servlet.openConnection();
con.setDoInput( true );
con.setDoOutput( true );
con.setUseCaches( false );
con.setRequestProperty( "Content-Type","text/plain" );
con.setAllowUserInteraction(false);
ObjectOutputStream out;
out = new ObjectOutputStream(con.getOutputStream());
Serializable[] data ={"test"};
out.writeObject( data );
out.flush();
out.close();
//until here are all rigth
ObjectInputStream in = new ObjectInputStream( con.getInputStream() );//happened error
JSP:
TestBean testBean = new TestBean ();
testBean .execute(request, response);
JAVABEAN:
public void execute( HttpServletRequest request,
HttpServletResponse response )
ObjectInputStream in = new ObjectInputStream( request.getInputStream() );
String direct = (String) in.readObject();
System.out.prinltn("direct");
ObjectOutputStream out = new ObjectOutputStream( response.getOutputStream() );
SerializableSerializable[] data ={"answer"};
out.writeObject( data );
out.flush();
out.close();
Error detail:
java.io.StreamCorruptedException: invalid stream header
     at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:729)
     at java.io.ObjectInputStream.<init>(ObjectInputStream.java:251)
     at TestApplet.postObjects(TestApplet.java:172)

you have to pay attention to the sequence of opening the streams.
The following example is: client sends a string to server, and servlet sends a response string back.
client side:
         URL url = new URL( "http://152.8.113.149:8080/conn/servlet/test" );
         URLConnection conn = url.openConnection();
         System.out.println( "conn: " + conn );
         conn.setDoOutput( true );
         conn.setDoInput( true );
         conn.setUseCaches( false );
         conn.setDefaultUseCaches (false);
         // send out a string
         OutputStream out = conn.getOutputStream();
         ObjectOutputStream oOut = new ObjectOutputStream( out );
         oOut.writeObject( strSrc );
         // receive a string
         InputStream in = conn.getInputStream();
         ObjectInputStream oIn = new ObjectInputStream( in );
         String strDes = (String)oIn.readObject();server side
         // open output stream
         OutputStream out = res.getOutputStream();
         ObjectOutputStream oOut = new ObjectOutputStream( out );
         // open input stream and read from client
         InputStream in = req.getInputStream();
         ObjectInputStream oIn = new ObjectInputStream( in );
         String s = (String)oIn.readObject();
         System.out.println( s );
         // write to client
         oOut.writeObject( s + " back" ); I have the complete example at http://152.8.113.149/samples/app_servlet.html
don't forget to give me the duke dollars.

SocketException during reads - JVM_recv in socket input stream read

I am getting a SocketException when a Java applet talks to our
WebLogic 7.0 server. The catch is that it only occurs at one site
(that has very high T1 utilization, although latency is only ~60 ms)
Our setup is such that the calls hit an Alteon load balancer, which
then sends the request out to one of 4 IIS clustered servers, where it
then is sent to one of 2 WL clustered servers. I figured latency
would be the cause, but on IIS and on WL, the timeouts are set to
several hundred seconds, so I am not quite seeing where the connection
is being reset. To be honest, I really don't know if it is WL that is
killing the connection, as nothing abnormal shows up in the WL log. I
have seen similar problems in this group, though, although the stack
traces never follow the same path mine does. I do have the following
call stack from the Java plug-in console, though. Any ideas would be
greatly appreciated.
java.net.SocketException: Connection reset by peer: JVM_recv in socket
input stream read
     at java.net.SocketInputStream.socketRead0(Native Method)
     at java.net.SocketInputStream.read(Unknown Source)
     at java.io.BufferedInputStream.fill(Unknown Source)
     at java.io.BufferedInputStream.read1(Unknown Source)
     at java.io.BufferedInputStream.read(Unknown Source)
     at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
     at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
     at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
     at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
     at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(Unknown
Source)
     at sun.plugin.net.protocol.http.HttpURLConnection.checkCookieHeader(Unknown
Source)
     at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
     at org.xxxx.abstracts.Controller.sendRequest(Controller.java:39)
     at org.xxxx.data.DataMediator.getDataNode(DataMediator.java:46)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Also, here is my code, although I can't see anything on the client
side that seems off:
public Object sendRequest( Object request, URL receiver ) throws
Exception{
Object response = null;
URLConnection con = null;
ObjectOutputStream out = null;
ObjectInputStream in = null;
try {
con = receiver.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setDefaultUseCaches(false);
con.setAllowUserInteraction(false);
out = new ObjectOutputStream(con.getOutputStream());
out.writeObject(request);
out.flush();
out.close();
in = new ObjectInputStream(con.getInputStream());
response = in.readObject();
in.close();
} catch (ClassCastException e) {
if( out != null ){
out.close();
if( in != null ){
in.close();
} catch (Exception e) {
if( out != null ){
out.close();
if( in != null ){
in.close();
throw e;
return response;

There is a known bug on earlier 1.3.1 releases with sockets on Windows 2k
and XP. I don't remember all the details.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com/coherence.jsp
Tangosol Coherence: Clustered Replicated Cache for Weblogic
"Keith Patrick" <[email protected]> wrote in message
news:[email protected]...
I'm getting the exception on the client, which is an XP machine, while
the server is Win2K. I can't recall which, but either the applet or
the server runs 1.3x while the other runs 1.4. I discounted that
factor, though, as the problem only occurs on one site, which on all
others it works fine.
"Cameron Purdy" <[email protected]> wrote in message
news:<[email protected]>...
Exception is in the applet or on the server?
Would one of those by any chance be running on W2K with JDK 131_01 orolder?
>>
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com/coherence.jsp
Tangosol Coherence: Clustered Replicated Cache for Weblogic
"Keith Patrick" <[email protected]> wrote in message
news:[email protected]...
I am getting a SocketException when a Java applet talks to our
WebLogic 7.0 server. The catch is that it only occurs at one site
(that has very high T1 utilization, although latency is only ~60 ms)
Our setup is such that the calls hit an Alteon load balancer, which
then sends the request out to one of 4 IIS clustered servers, where it
then is sent to one of 2 WL clustered servers. I figured latency
would be the cause, but on IIS and on WL, the timeouts are set to
several hundred seconds, so I am not quite seeing where the connection
is being reset. To be honest, I really don't know if it is WL that is
killing the connection, as nothing abnormal shows up in the WL log. I
have seen similar problems in this group, though, although the stack
traces never follow the same path mine does. I do have the following
call stack from the Java plug-in console, though. Any ideas would be
greatly appreciated.
java.net.SocketException: Connection reset by peer: JVM_recv in socket
input stream read
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at
sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderFields(Unknown
Source)
atsun.plugin.net.protocol.http.HttpURLConnection.checkCookieHeader(Unknown
Source)
atsun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at org.xxxx.abstracts.Controller.sendRequest(Controller.java:39)
at org.xxxx.data.DataMediator.getDataNode(DataMediator.java:46)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Also, here is my code, although I can't see anything on the client
side that seems off:
public Object sendRequest( Object request, URL receiver ) throws
Exception{
Object response = null;
URLConnection con = null;
ObjectOutputStream out = null;
ObjectInputStream in = null;
try {
con = receiver.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setDefaultUseCaches(false);
con.setAllowUserInteraction(false);
out = new ObjectOutputStream(con.getOutputStream());
out.writeObject(request);
out.flush();
out.close();
in = new ObjectInputStream(con.getInputStream());
response = in.readObject();
in.close();
} catch (ClassCastException e) {
if( out != null ){
out.close();
if( in != null ){
in.close();
} catch (Exception e) {
if( out != null ){
out.close();
if( in != null ){
in.close();
throw e;
return response;

How to get file input stream from the client machine by JSF Fileupload API?

Dear Friends,
How to get the file input stream from the client machine by JSF HtmlFileupload or fileupload API. At present, if i execute the file upload code in the client machine, it is able to get the local path of the file and looking for the file in server machine. So i am getting FileNotFoundException.
E.g., If a file is located at client machine at following location means "C:\Test\Test.txt",
uploadClass.getFileuploadComponent().getFilename().toString() returns "C:\Test\Test.txt". But it is looking for that file in server and throwing FileNotFoundException.
Please post your replies soon.
Thanks,
JP

Depends on which version of JSF you're using. If JSF 1.2, I wouldn't even bother trying to hack this into JSF itself unless you can use something like Seam 2 or richfaces.
http://docs.jboss.org/richfaces/latest_3_3_X/en/devguide/html/rich_fileUpload.html
http://docs.jboss.org/seam/2.2.1.CR3/reference/en-US/html/controls.html#d0e29259 (look for s:fileUpload)
But if I were you, a simple non-jsf form with a servlet works best for taking file uploads.
As for JSF 2.0, there are other ways of getting it done.
http://balusc.blogspot.com/2009/12/uploading-files-with-jsf-20-and-servlet.html

Playing input stream audio in j2me

want to make a text-to-speech synthesizer for mobile phones.
for that i am using FreeTTS (text-to-speech synthesizer written in java)
so i have made a client-server model where i have a midp client which is sending text to the FreeTTS acting as a server.... for this i am using socket...
so basically -- client is sending text to server -- server processes the text and sends the audio stream back to client
the problem is i dont know how to play the audio stream received on client side
i tried to copy it in a buffer but its not working..
do i need to save the file in some format before playing it?
or can the player play the audio stream directly?
this is how i am copying the contents in the buffer
try
InputStream is = socketConnection.openInputStream();
byte[] buff = new byte[1024];
int bytesIn = is.read(buff, 0, 1024);
ByteArrayInputStream bis = new ByteArrayInputStream(buff);
player = Manager.createPlayer(bis, "audio/x-wav" );
player.start();
but it gives an error saying
javax.microedition.media.MediaException: Malformed wave media
i tried to display the contents of bis on console it reads
java.io.ByteArrayInputStream@d590dbc
i tried the same with the Free TTS client and got the same output.
so i think client socket is even receiving the audio stream properly...however, im not sure.
is the whole client-server using socket idea correct?
if yes, please tell me how to play this audio stream in j2me (the client)
if it is wrong then please tell me a correct way to do this.
can the input stream be stored as a WAV file and then played? if yes, then how can i store it as a WAV file? Can this be achieved by appending a WAV header?

I once tried the similar thing, I ended up buffer all the content locally (from bluetooth), then play the wave file.
Maybe someone else has better idea.

Reading input stream over the tcp socket in unix

I have a program that reads data from input stream from the socket. If the data is over 1500 bytes it is sent in multiple TCP packets. Whats weird is, if I run the program in windows environment it waits till it receives all the packets but when I run the same program in unix environment it only reads the first packet and go further without waiting for all the TCP packets!!
The line that reads from input stream is
datalen = inStr.read(byteBuffer);is there anyway I can make it wait till it receives all the packets on unix system? I do not understand why it works fine for windows in this case but not for unix.
I'll appreciate any help..
Thanks

When the network is busy there can be any amount of dleay between packets. If this is ever 100 ms , then this will break.
If you send more than one packet per 100 ms you will get two packets at once which will look like one longer packet. Unless you check for this the second packet may get ignored.
The safe way is to send the packet size before sending the packet. Then on the client read the packet to the correct length. Otherwise you will have a program which just happens to work rather than one which will always work.

IOException: Connection reset by peer: JVM_recv in socket input stream read

hi
I encountered a problem : a program throw out an exception:java.io.IOException: Io exception:
Connection reset by peer: JVM_recv in socket input stream read.
I tried my best to resolve it ,but unfortunately,i didn't know what caused the exception.
the following is my application environment:
I have two PC(Win2000os),one is a server which installed oracle9.2.0.2 and jdeveloper9.0.3,the another is a
client which only intalled jdeveloper9.0.3.Two days ago,i performed a web application on my client with
jdeveloper,and it includes some JSP and a javabean files.JSP Page finished uploading client xml file to a
folder on server and the javabean finished loading the xml file into a xmltype column.I can make sure the
connection is established and the javabean is OK,beacause my some jsp page can successfully use
<jsp:usebean> tag and use the javabean's some other public interfaces,except the interface that finishs
loading the xml file into a xmltype(clob) column.
Then i do many tests!I changed the javabean to a java class incluse a main method beacause it is easy to
debug.Finally i found the following code caused the exception:
public CLOB writetoClob( CLOB clob, InputStream is )throws SQLException, IOException {
InputStreamReader reader = new InputStreamReader( is );
Writer writer = clob.getCharacterOutputStream( );
char[] buffer = new char[clob.getChunkSize( )];
int charsRead;
for ( charsRead = reader.read( buffer ); charsRead > -1;charsRead = reader.read( buffer ) ) {
writer.write( buffer, 0, charsRead );
writer.close();
return clob;
when it runs to writer.close(),the exception is caused!
Then i copy the java class to the server,it runs ok!
That is to say ,the same code,the different result!
But when i run my web application on server with jdeveloper Embedded OC4J Server and a jsp page loaded javabean
and run to mentioned code ,the same exception occured!
I checked the application log in event viewer,the descriptions was:
The data buffer created for the "AppleTalk" service in the "C:\WINNT\system32\atkctrs.dll" library is not
aligned on an 8-byte boundary. This may cause problems for applications that are trying to read the
performance data buffer. Contact the manufacturer of this library or service to have this problem corrected or
to get a newer version of this library.
I search some some resolution about this exception with web and someone sayed :
This basically means that a network error occurred while the client was receiving data from the server. But
what is really happening is that the server actually accepts the connection, processes the request, and sends a
reply to the client. However, when the server closes the socket, the client believes that the connection has
been terminated abnormally because the socket implementation sends a TCP reset segment telling the client to
throw away the data and report an error.
Sometimes, this problem is caused by not properly closing the input/output streams and the socket connection.
Make sure you close the input/output streams and socket connection properly. If everything is closed properly,
however, and the problem persists, you can work around it by adding Thread.sleep(1000) before closing the
streams and the socket. This technique, however, is not reliable and may not work on all systems.
In general,the following information is conclution:
Web application runs error both on client and on server.
If it was changed to a client java class,it only run ok on server!
i have done anything that i can do now,i feel depressed very much!
how can i resolve the problem!
Any a little help will be appreciated!
regards!
Thanks
Jiawei ZHAO

How can i solve the problem.
Thanks in advance!
Jiawei Zhao

JVM_recv in socket input stream read (code=10004)

Whilst trying to get a file listing from an FTP server (by sending FTP commands directly to the server according to RFC959)
I got..
JVM_recv in socket input stream read (code=10004)
What does this mean? Any idea why it is caused, the socket should be open as far as I am concerned - could something external be affecting it?

Platform/JVM? I'd guess Windows - 10004 looks like WSAEINTR, from WinSock. (Here's some specifics that may help:
http://support.ipswitch.com/kb/WSK-19980714-EM08.htm )

Server Socket does not read data input stream

Hi all,
I am very newbie to Java Network programming with sockets and multi-threading.
But I am obliged to develop a chat system written in Applets which can be placed on the website and used by visitors who come to my website.
In order to understand this, I have tested a basic web chat program I downloaded from the Internet which use sockets and multi-threadings. The program work fine, no bugs at all at both compilation and run time. I noticed that all three streams for Client side (i.e. first one is input stream used receiving data from User; the second one is socket input stream used for receiving data from Server socket, and the third is socket output stream used for writing data to server socket) were established. And the same, two socket streams (input & output) for Server side were also connected when running program giving right port number and IP address of the server.
The problem is both server and client sockets do not read data using the following stream classes:
1. DataStreamInput: I use input.readUTF() method
2. or BufferedReader: I use input.readLine() method
The example of the codes are below:
private BufferedReader input = null;
private PrintWriter output = null;
private Socket socket = null;
public void open() throws IOException
{ input = new BufferedReader(new
InputStreamReader(socket.getInputStream()));
System.out.println("Server socket input stream was created, and");
output = new PrintWriter(socket.getOutputStream());
System.out.println("Server socket output stream was created");
public void run()
{ System.out.println("Server Thread " + clientPort + " running.");
while (true)
{ try
System.out.println("Server is reading data from Client, wait...");
String fromClient = input.readLine();
System.out.println("Server received a message on " + clientPort + ".");
catch(IOException ioe)
{ System.out.println(clientPort + " ERROR reading: " + ioe.getMessage());
server.remove(clientPort);
stop();
The problem is at the line: String fromClient = input.readLine(); in the run() method? What is wrong with the codes above?
Note: I also try to use original codes which use readUTF() method in DataStreamInput class instead using readLine() in BufferedReader. Both methods dont read data from inputstream socket?
I very appreciate any help/advice from experienced developers.
Best regards

Hi,
Yes. The readLine() method hangs! After the test, the execuation of the program is stopped at the line of readLine() method; it does not pass it?
There is no problem with writing to Server socket. After the test, the program pass through flush() method. Here is the code for writing to sever socket within ChatClient (client side socket) class:
private BufferedReader input = null;
private PrintWriter           output = null;
public ChatClient(String serverName, int serverPort)
{ System.out.println("Establishing connection. Please wait ...");
try
{ socket = new Socket(serverName, serverPort);
System.out.println("Connected: " + socket);
start();
catch(UnknownHostException uhe)
{ System.out.println("Host unknown: " + uhe.getMessage()); }
catch(IOException ioe)
{ System.out.println("Unexpected exception: " + ioe.getMessage()); }
public void start() throws IOException
{ input   = new BufferedReader (new
                         InputStreamReader(System.in));
System.out.println("Client User input stream was created,");
output = new PrintWriter(socket.getOutputStream());
System.out.println("Client Socket output stream was established, and");
if (thread == null)
{ client = new ChatClientThread(this, socket);
thread = new Thread(this);
thread.start();
public void run()
     while (thread != null) {
     String fromUser;
          try{
               while((fromUser = input.readLine())!= null)
               System.out.println("Client wasreading a data from User, and");
output.println(fromUser);
     output.flush();
     System.out.println("Client has written a data to Server");
catch(IOException ioe)
{ System.out.println("Sending to server error: " + ioe.getMessage());
stop();
etc.
Here is a piece of codes for reading data from the Client Socket in the ChatServer Class (Server Side socket):
public void run()
{ System.out.println("Server Thread " + clientPort + " running.");
while (true)
{ try
{ //server.handle(clientPort, input.readLine());
System.out.println("Server is reading data from Client, wait...");
String fromUser = input.readLine();
//while((fromUser = input.readLine()) != null)
     System.out.println("Server received a message on " + clientPort + ".");
catch(IOException ioe)
{ System.out.println(clientPort + " ERROR reading: " + ioe.getMessage());
server.remove(clientPort);
stop();
etc. Please advice why the readLine() method hangs; does not read data from the input stream received from the CLIENT?

Problem reading input stream of urlconnection within portal

Hi,
This may be a generic server issue rather than portal but since it's my portal app that's displaying the problem I'll post it here.
Part of my Portal attempts to POST to a remote server to retrieve some search results.
In environments A & B (both standalone instances) this works fine.
In environment C this works on the managed instances in the cluster but not the admin instance.
In environment D (again standalone) it fails, but if I add a managed instance it works from the managed instance.
The problem I'm seeing is that I get a stuck thread and the thread dump shows it is blocked attempting to read the resulting input from a urlconnection. (Using a buffered input stream).
I've copied the code to a standalone class that runs fine from the same server(s). I've pasted this code below, the contents of the test() method were copied directly from my webapp (urls changed here for clarity).
Does anyone know of any securitymanager issues that may cause this?
Or anything else for that matter?
Code sample:
package src.samples;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
public class POSTTest {
     public static boolean test()
     URL url = null;
     try {
     url = new URL
("http://hostx:80/myapp/search.html");
     catch (MalformedURLException e)
     e.printStackTrace();
     return false;
     URLConnection urlConn;
     DataOutputStream printout;
     BufferedReader input;
     urlConn = null;
     try {
     urlConn = url.openConnection();
     catch (IOException e)
     e.printStackTrace();
     return false;
     // Let the run-time system (RTS) know that we want input.
     urlConn.setDoInput (true);
     // Let the RTS know that we want to do output.
     urlConn.setDoOutput (true);
     // No caching, we want the real thing.
     urlConn.setUseCaches (false);
     // Specify the content type.
     urlConn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
     // Send POST output (this is a POST because we write then read as per the JDK Javadoc)
     printout = null;
     String body = "";
     try {
     System.out.println("url=" + url.toString());
     printout = new DataOutputStream (urlConn.getOutputStream ());
     String content = "param1=A&param2=B&param3=C&param4=D&param5=E";
     System.out.println("urlParams= " + content);
     printout.writeBytes (content);
     System.out.println("written parameters");
     printout.flush ();
     System.out.println("flushed parameters");
     printout.close ();
     System.out.println("closed parameter stream");
     // <b>Get response data - this is where it blocks indefinitely</b>
     input = new BufferedReader(new InputStreamReader(urlConn.getInputStream()));
     System.out.println("got input");
     String str;
     while (null != ((str = input.readLine()))) {
     body = body + str + "\n";
     System.out.println("read input:");
     System.out.println(body);
     input.close ();
     System.out.println("closed input stream");
     catch (IOException e) {
     System.out.println("IOException caught: read failed");
     e.printStackTrace();
     return false;
     return true;
     * @param args
     public static void main(String[] args) {
          System.out.println("Test result= " + test());

In your recuperar() method, read the FTP input stream into a byte array. (You can do that by copying it to a ByteArrayOutputStream and then getting the byte array from that object.) Then, return a ByteArrayInputStream based on those bytes. After you call completePendingCommand(), of course.
That's one way.
PC²

Unexpected end of ZLIB input stream.

Hello everyone.
I have a problem which I was unable to solve so far. Any suggestion is very welcome.
The scenario.
My process worked on a previously installed default install 10.1.3.1 platform.
I installed the SOA Suite (same, very default set with olite) on a different computer and copied all files of the project dir. Modified file paths and URLs in all files in the folder and deployed the process with jdeveloper.
Symptoms.
Flow viewer gets stuck at Loading audit trail. Messages from a java call get to manual recovery, and will not recover.
I start the process with a java call:
Locator locator = new Locator("default","bpel");
IDeliveryService deliveryService = (IDeliveryService)locator.lookupService(IDeliveryService.SERVICE_NAME);
NormalizedMessage nm = new NormalizedMessage( );
nm.addPart("payload", xml );
deliveryService.post("OrderFlow", "initiate", nm);
it starts without any problems and runs until a callback (receive) activity, where it is waiting for a message using the same java api calls as above.
This runs well on the previous system, however the new system will not deliver the message.
Log output.
After trying to access the flow viewer:
<2008-03-19 20:13:12,120> <ERROR> <default.collaxa.cube> <BaseCubeSessionBean::logError> Error while invoking bean "instance manager": Cannot uncompress data stream.
Cannot uncompress data stream with GZIP algorithm; exception is Unexpected end of ZLIB input stream.
ORABPEL-02018
Cannot uncompress data stream.
Cannot uncompress data stream with GZIP algorithm; exception is Unexpected end of ZLIB input stream.
     at com.collaxa.cube.engine.util.CompressUtils.uncompressStream(CompressUtils.java:184)
     at com.collaxa.cube.engine.util.DBUtils.getUncompressedBLOB(DBUtils.java:358)
     at com.collaxa.cube.engine.util.DBUtils.getUncompressedBLOB(DBUtils.java:310)
     at com.collaxa.cube.engine.adaptors.common.BaseCubeInstancePersistenceAdaptor$BaseScopeHandler.load(BaseCubeInstancePersistenceAdaptor.java:1268)
     at com.collaxa.cube.engine.adaptors.common.BaseCubeInstancePersistenceAdaptor.load(BaseCubeInstancePersistenceAdaptor.java:348)
     at com.collaxa.cube.engine.adaptors.common.BaseCubeInstancePersistenceAdaptor.load(BaseCubeInstancePersistenceAdaptor.java:251)
     at com.collaxa.cube.engine.data.CubeInstancePersistenceMgr.__load(CubeInstancePersistenceMgr.java:252)
     at com.collaxa.cube.engine.data.CubeInstancePersistenceMgr.load(CubeInstancePersistenceMgr.java:136)
     at com.collaxa.cube.engine.CubeEngine.load(CubeEngine.java:4859)
     at com.collaxa.cube.engine.CubeEngine.getInstanceTrace(CubeEngine.java:2415)
     at com.collaxa.cube.ejb.impl.InstanceManagerBean.getInstanceTrace(InstanceManagerBean.java:168)
     at sun.reflect.GeneratedMethodAccessor275.invoke(Unknown Source)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at com.evermind.server.ejb.interceptor.joinpoint.EJBJoinPointImpl.invoke(EJBJoinPointImpl.java:35)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.JAASInterceptor$1.run(JAASInterceptor.java:31)
     at com.evermind.server.ThreadState.runAs(ThreadState.java:620)
     at com.evermind.server.ejb.interceptor.system.JAASInterceptor.invoke(JAASInterceptor.java:34)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.TxNotSupportedInterceptor.invoke(TxNotSupportedInterceptor.java:43)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.interceptor.system.DMSInterceptor.invoke(DMSInterceptor.java:52)
     at com.evermind.server.ejb.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:119)
     at com.evermind.server.ejb.InvocationContextPool.invoke(InvocationContextPool.java:55)
     at com.evermind.server.ejb.StatelessSessionEJBObject.OC4J_invokeMethod(StatelessSessionEJBObject.java:87)
     at InstanceManagerBean_RemoteProxy_4bin6i8.getInstanceTrace(Unknown Source)
     at com.oracle.bpel.client.InstanceHandle.getInstanceTrace(InstanceHandle.java:267)
     at xmlGetInstanceTrace.jspService(_xmlGetInstanceTrace.java:56)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:59)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:453)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:591)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:515)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
     at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:64)
     at oracle.security.jazn.oc4j.JAZNFilter$1.run(JAZNFilter.java:396)
     at java.security.AccessController.doPrivileged(Native Method)
     at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:410)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:621)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:368)
     at com.evermind.server.http.ServletRequestDispatcher.unprivileged_forward(ServletRequestDispatcher.java:259)
     at com.evermind.server.http.ServletRequestDispatcher.access$100(ServletRequestDispatcher.java:50)
     at com.evermind.server.http.ServletRequestDispatcher$2.oc4jRun(ServletRequestDispatcher.java:193)
     at oracle.oc4j.security.OC4JSecurity.doPrivileged(OC4JSecurity.java:283)
     at com.evermind.server.http.ServletRequestDispatcher.forward(ServletRequestDispatcher.java:198)
     at com.collaxa.cube.fe.DomainFilter.doFilter(DomainFilter.java:131)
     at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:15)
     at oracle.security.jazn.oc4j.JAZNFilter$1.run(JAZNFilter.java:396)
     at java.security.AccessController.doPrivileged(Native Method)
     at javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
     at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:410)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:619)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:368)
     at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:866)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:448)
     at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:216)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:117)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:110)
     at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:303)
     at java.lang.Thread.run(Thread.java:595)
After sending the message
<2008-03-19 15:20:58,984> <ERROR> <default.collaxa.cube.engine.dispatch> <DispatchHelper::handleMessage> failed to handle message
ORABPEL-02018
Cannot uncompress data stream.
Cannot uncompress data stream with GZIP algorithm; exception is Unexpected end of ZLIB input stream.
... and ...
<2008-03-19 15:20:58,994> <ERROR> <default.collaxa.cube.engine> Attempt (1/2): caught non-fatal connection exception ... retry
<2008-03-19 15:21:00,075> <ERROR> <default.collaxa.cube> <BaseCubeSessionBean::logError> Error while invoking bean "cube delivery": Cannot uncompress data stream.
Cannot uncompress data stream with GZIP algorithm; exception is Unexpected end of ZLIB input stream.
ORABPEL-02018
Cannot uncompress data stream.
Cannot uncompress data stream with GZIP algorithm; exception is Unexpected end of ZLIB input stream.
===================
THANK YOU

Some update on the issue.
I have a quite complicated BPEL process, which has this symptom.
I figured out however, that if I dont use the TaskService, it does run well.
So I just created a test bpel process with nothing but a human task.
It failed with the same unexpected end of zlib ... problem.
What I also noticed is that the task appears in the worklist app, but the reply gets into the callback manual recovery pool. there must be some kind of communication failure from the taskservice in the direction of the bpel process.
Any advice is welcome,
thx,
tg

Read input stream

My function tried to parse a inputstream(xml format) but I keep getting exception: Exception org.xml.sax.SAXParseException: The root element is required in a well-formed document. I checked my XML format, it looks correct. Is there a way I can print out the input stream but still be able to parse it later with the sam input stream? Thanks.
public static final Document getDOMTree(InputStream input) throws Exception
try
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
     DocumentBuilder builder = factory.newDocumentBuilder();
     Document doc = builder.parse(input);
return doc;
} catch(DOMException de) {
System.out.println("parse error " +de);
     throw new Exception(de.toString());
} catch(Exception e)
System.out.println("Exception " +e);
     throw new Exception(e.toString());
}

Here's a class that I use for viewing outputstreams in a similar way - you can either adjust it to work as an input stream, or do a quick web search on TeeInputStream - I suspect you'll find some code.
Cheers,
- K
* Copyright (c) 2001 Matthew Feldt. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided the copyright notice above is
* retained.
* THIS SOFTWARE IS PROVIDED ''AS IS'' AND WITHOUT ANY EXPRESSED OR
* IMPLIED WARRANTIES.
* TeeOutputStream.java
* Java Examples In A Nutshell Copyright (c) 2000 David Flanagan
* Exercise 3-7:
* Write a subclass of OutputStream named TeeOutputStream that acts like a T
* joint in a pipe; the stream sends its output to two different output streams,
* specified when the TeeOutputStream is created. Write a simple test program
* that uses two TeeOutputStream objects to send text read from System.in to
* System.out and to two different test files.
* @author Matthew Feldt <[email protected]>
* @version 1.0, 02/12/2001 08:23
import java.io.*;
public class TeeOutputStream extends OutputStream {
    OutputStream ostream1, ostream2;
    /** sole TeeOutputStream constructor */
    public TeeOutputStream(OutputStream o1, OutputStream o2) throws IOException {
        ostream1 = o1;
        ostream2 = o2;
    public void close() throws IOException {
        ostream1.close();
        ostream2.close();
    public void flush() throws IOException {
        ostream1.flush();
        ostream2.flush();
    public void write(int b) throws IOException {
        byte[] buf = new byte[1];
        buf[0] = (byte)b;
        write(buf, 0, 1);
    public void write(byte[] b, int off, int len) throws IOException {
        ostream1.write(b, off, len);
        ostream2.write(b, off, len);
    /** test class */
    static class Test {
        public static void main (String args[]) {
            final String f1 = "tee1.out", f2 = "tee2.out";
            int ch;
            try {
                // create a TeeOutputStream with System.out and a file
                // as output streams
                TeeOutputStream t1 = new TeeOutputStream(
                    System.out, new FileOutputStream(f1));
                // create a TeeOutputStream with t1 and a second file as
                // output streams
                TeeOutputStream tee = new TeeOutputStream(
                    t1,    new FileOutputStream(f2));
                // read characters from System.in and write to the tee
                while ((ch = System.in.read()) != -1) {
                    tee.write(ch);
                tee.close(); // close the tee
            } catch(FileNotFoundException e) {
                System.err.println(e.getMessage());
            } catch(IOException e) {
                System.err.println(e.getMessage());
}

Java.lang.Process input stream waiting until process is complete to print

I have tried to simplify this problem as much as possible. Basically, I have a java.lang.Process which executes a simple C program.
test.c
#include <stdio.h>
#include <unistd.h>
int main()
printf("foo\n");
sleep(2);
printf("bar\n");
...The process has an input stream and error stream handler each on a separate thread. I have tried both buffered and unbuffered (BufferedReader, BufferedInputStream, InputStreamReader...) stream handlers. Both produce the same problem of waiting until the process has exited to receive anything from the process's streams.
The only time this does not happen is when I call fflush(stdout); after each printf(). This can't be a solution because the real application calls a massive C application which would require thousands of fflush()'s to be added. What is causing this to happen? This doesn't happen when the C program is executed from the shell. Is there a way the InputStream can be forced to extract from the stream?

hi.....
I have closed the output stream of the process as you told me to do...
The hitch is that, if my program contains only printf() statements,it works fine
as soon as scanf() statement is encountered within the C code,it is totally neglected,and the output comes as if no scanf() statement existed in the C code.
Consequently the thread doesnt wait for input which was bound for scanf() from the thread
the code...
    public void run()
     try
         PrintWriter out = new PrintWriter(socket.getOutputStream(),true);
         BufferedReader in = new BufferedReader(
                        new InputStreamReader(
                        socket.getInputStream()));
         try
                 Process p;
          p=new ProcessBuilder("./a.out").start();
                 PrintWriter exOut=null;
                 BufferedReader exIn=null;
          exOut = new PrintWriter(p.getOutputStream(),true);
          exIn = new BufferedReader(
                       new InputStreamReader(
                       p.getInputStream()));
              //String inputLine="", outputLine="";
              String str="";
                 int c;
              while(true)
                    //System.out.println("In While");
              str="";exOut.close();
                    while((c=exIn.read())!=-1)
                             str=str+(char)(c);
                                System.out.print(str);
                    str=str+(char)(0);
                    System.out.print(str+"outside");
                    out.print(str);
                    sleep(100);
                    try
                        int x=p.exitValue();
                          out.print(str);
               System.out.print("Bye 1");
                        String str1="Bye"+(char)(0);
               out.println(str1);
               break;
                    catch(IllegalThreadStateException e)
                        //System.out.println("The Process has not ended yet");
                    //str=str+((char)-1);
                    //System.out.print(str+"Control reaches here too");
                    str="";
                    exOut = new PrintWriter(p.getOutputStream(),true);//I have tried to run the program without this also but the effect is the same
                    while((c=in.read())!=-1)
                        str=str+(char)(c);
                    if(str.contentEquals(""))
                            System.out.print("Bye 2");
                            String str1="Bye"+(char)(0);
                            out.println(str1);
                            p.destroy();
                            exOut.close();
                            exIn.close();
                            out.close();
                            in.close();
                            socket.close();
                            break;
                    //str=str+(char)(0);
              exOut.print(str);
                    try
                        int x=p.exitValue();
                        System.out.print("Bye 3");
                        String str1="Bye"+(char)(0);
               out.println(str1);
                        break;
                    catch(IllegalThreadStateException e)
                        //System.out.println("The Process has not ended yet");
              /*while ((inputLine = in.readLine()) != null)
                    exOut.println(inputLine);
                    outputLine=exIn.readLine();
                    //outputLine=inputLine;
                    //out.println(outputLine);}*/
         exOut.close();
         exIn.close();
         catch(IOException e)
              System.err.println("Accept failed."+e);
         out.close();
         in.close();
         socket.close();
     catch (Exception e)
         e.printStackTrace();
}

Sending Control-Z to Input Stream

Similar Messages

Maybe you are looking for