ISQL*Plus script parsing problem with the + operator

Hi,
You have most likely caught this one already.
Select power(3,2) + power(3,2) from dual;
Works from the iSQL*plus window but not when loaded from a script; the + operator is getting removed.
Regards,
Rob
null

Thanks for the report. The fix for this is indeed already in our 9.0 code (which will be the next release of iSQL*Plus)
- CJ

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Problem with the cache hit ratio

Hello,
I ma having a problem with the cache hit ratio I am geting. I am sure, 100% sure, that something has got to be wrong with the cache hit ratio I am fetching!
1) I will post the code that I am using to retrieve the cache hit ratio. I've seen about a thousand different equations, all equivalent in the end.
In oracle cache hit ratio seems to be:
cache hits / cache lookups,
where cache hits <=> logica IO - physical reads
cache lookups <=> logical IO
Now some people use the session logical Reads stat, from teh view v$sysstat; others use db block gets + db consistent gets; whatever. At the end of the day its all the same, and this is what i Use:
SELECT (P1.value + P2.value - P3.value) AS CACHE_HITS, (P1.value + P2.value) AS CACHE_LOOKUPS, P4.value AS MAX_BUFFS_SIZEB
FROM v$sysstat P1, v$sysstat P2, v$sysstat P3, V$PARAMETER P4
WHERE
P1.name = 'db block gets' AND
P2.name = 'consistent gets' AND
P3.name = 'physical reads' AND
P4.name = 'sga_max_size'
2) The problem:
The cache hit ratio I am retrieving cannot be correct. In this case i was benchamarking a HUGELY inneficient query, consisting of the Union of 5 Projections over the same source table, and Oracle is configured with a relatively small SGA of 300 MB. They query plan is awful, the database will read the source database table 5 times.
And I can see in the physical data statistics of the source tablespace, that total Bytes read is aproximatly 5 times the size of the text file that I used to bulk load data into the databse.
Some of the relevant stats, wait events:
db file scattered read     1129,93 seconds
Elapsed time: 1311,9 seconds
CPU time: 179,84
SGA max Size: 314572800 Bytes
And total bytes read: 77771964416 B (aproximatly 72 Gga bytes)
the source txt loaded to the database was aprox 16 G
Number of reads was like 4.5 times the source datafile.
I would say this, given the difference between CPU time and Elapsed Time, it is clear that the query spent almost all of its time doin DB file scattered reads. How is it possible that i get the following cache hit ratio:
Cache hit Ratio: 0,92
Cache hits: 109680186
Cache lookups: 119173819
I mean only 8% of that Logical I/O corresponded to physical I/O? It is just not possible.
3) Procedure of taking stats:
Now to retrieve these stats I snapshot the system 2 times. One before the query, one after the query.
But: this is not done in a single session. In total 3 sessions are created. One session two retrieve the stats before the query, one session to run the query, a last session to snapshot after the query.
Could the problem, assuming there is one, be related to this:
"The V$SESSTAT view contains statistics on a per-session basis and is only valid for the session currently connected. When a session disconnects all statistics for the session are updated in V$SYSSTAT. The values for the statistics are cleared until the next session uses them."
What does this paragraph mean. Does it mean that the v$sysstat only shows you the stats of the last session that closed? Or does it mean thtat v$sysstat is increamented with the statistics of each v$sessionstat once a session terminates? If so, then my procedure for gathering those stats should be correct.
Can anyone help me sort out the origin of such a high cache hit ratio, with so much I/O being done?

sono99 wrote:
Hi,s
first of, let me start by saying that there were many things in your post that you mentioned that I could no understand. 1. Because i am not an Oracle Expert, i use whatever RDBMS whenever i need to. 2. Because another problem has come up and, right now, i cannot inform myself to be able to comprehend it all.Well, could it be that you need to understand the database you are working on in order to comprehend it? That is why we strongly advise you to read the concepts manual first, you need to understand the architecture that Oracle uses, as well as the basic concepts of how oracle does locking and maintains read consistency. It does these different than other database engines, and some things become nonsense if looked at from the viewpoint of a single user.
>
quote:
It would be useful to see the execution plan jhust in case you have simplified the problem so much that a critical detail is missing.
First, the query code:
2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:>SQL> CREATE TABLE FAVFRIEND
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 2 NOLOGGING TABLESPACE TARGET
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 3 AS
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 4 SELECT ID as USRID, FAVF1 as FAVF FROM PROFILE
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 5 UNION ALL
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 6 SELECT ID as USRID, FAVF2 AS FAVF FROM PROFILE
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 7 UNION ALL
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 8 SELECT ID as USRID, FAVF3 AS FAVF FROM PROFILE
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 9 UNION ALL
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 10 SELECT ID as USRID, FAVF4 AS FAVF FROM PROFILE
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 11 UNION ALL
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 12 SELECT ID as USRID, FAVF5 AS FAVF FROM PROFILE
[2009-10-20 15:11:59,141 INFO]: OUTPUT_GOBLER:> 13 ;
Now, Althought it is clear from the query that the statement is executed with the NOLOGGiNG, i have disabled the logging entirely for the tablespace.There are certain rules about nologging that may not be obvious. Again, this derives from the basic Oracle architecture, and if you use the wrong definitions of things like logging, you will be led down the primrose path to confusion.
>
Futhermore, yes, the RDBMS is a test RDBMS... I have droped the database a few times... And I am constantly deleting an re-inserting data into the source database table named PROFILE.>
I also make sure do check all the datafile statistics, and for this query the amount of RedoLog, Undo "Log", Templife used is negligible, practically zero.Create table is DDL, which has implied commits before and afterwards. There is a lot going on, some of it dependent on the volume of data returned. The Oracle database writer writes things out when it feels like it, there are situations where it might just leave it in memory for a while. With nologging, Oracle may not care that you can't perform recovery if it is interrupted. So you might want to look into statspack or EM to tell you what is going on, the datafile statistics may not be all that informative for this case.
>
Most of the I/O is reading, a few of the I/O is writing.
My idea is not to optimize this query, it is to understand how it performs. Well, have you read the Concepts manual?
I have other implementations to test, namely I having trouble with one of them.
Furthermore, I doubt the query Plan Oracle is using actually involves tablescans (as I I'd like it to do); because in the Wait Events, most of the wait time for this query is spent doing "db file scattered read". And I think this is different from a tablescan.Please look up the definition of [db file scattered read|http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/instance_tune.htm#sthref703].
>
Do you really have to use sessions external to the query session ? Can you query v$mystat joined to v$statname from the session itself.
No, I don't want to that!
I avoid as much as possible having the code I execute being implemented in java. Why do you think java has anything to do with this? In your session, desc v$mystat and v$statname, these are views you can look at.
When i can avoid it I don't query the database directly through JDBC, i use the RDBMS command line client, which is supposed to be very robust. Er, is that sqlplus?
So yes, I only connect to the database with JDBC... in very last session.
Of course, I Could Have put both the gather stats before query and gathers stats after query a single script: the script that would be also runing the query.
But that would cause me a number of problems, namely some of the SQL i build has to be implemented dynamically. And I don't want to be replicating the snapshoting code into every query script I make. This way I have one sql with the snapshoting scripts; and multiple scripts for running each query. I avoid code replication in this manner.Instrumentation is a large subject; dynamic sql generation is something to be avoided if possible. Remember, Oracle is written with the idea that many people are going to be sharing code and the database, so it is optimized in that way. For SQL parsing in particular, if every SQL is different, you get a performance problem called "hard parsing." You can (and generally should, and sometimes can't avoid) use bind variables so that Oracle doesn't need to hard parse every SQL. In fact, this is one of those things that applies to other engines besides Oracle. I would recommend you read Tom Kyte's books, he explains what is going on in detail, including in some places the non-Oracle viewpoint.
>
Furthermore, Since the database is not a production database, it is there so I can do my tests. I don't have to be concerned with what other sessions may be doing to my system. There are only the sessions I control.No, there are sessions Oracle controls. If you are on unix, you can easily see this, but there are ways to see it on Windows, too. In some cases, your own sessions can affect themselves.
>
then what it the array fetch size ? If the array fetch size is large enough the number of block visits would be similar to the number of physical block reads.
I don't know what the arraysize you mention is. i have not touched that parameter. So whatever it is, it's the default.You should find out! You can go to http://tahiti.oracle.com and type array fetch size into the search box. You can also go to http://asktom.oracle.com and do the same thing, with some more interesting detail.
>
By the way, I don't get the query results into my client, the query results are dumped into a target output table.
So, if the arraysize has something to do with the number of rows that Oracle is returning the client in each step... I think it doesn't matter.You may hear this phrase a lot:
"It depends."
>
As for the query plan, If i am not mistaken you can't get get query plans for queries that are: create table as select.What?
JG@TTST> explain plan for create table jjj as select * from product_master;
Explained.
JG@TTST> select count(*) from plan_table;
COUNT(*)
         3
I can however commit the create table part and just call for the evalution of the Select part of the query; i believe it should be same.
"Optimizer"     "Cost"     "Cardinality"     "Bytes"     "Partition Start"     "Partition Stop"     "Partition Id"     "ACCESS PREDICATES"     "FILTER PREDICATES"
"SELECT STATEMENT"     "ALL_ROWS"     "2563"     "586110"     "15238860"     ""     ""     ""     ""     ""
"UNION-ALL"     ""     ""     ""     ""     ""     ""     ""     ""     ""
"TABLE ACCESS(FULL) SONO99.PROFILE"     ""     "512"     "117222"     "3047772"     ""     ""     ""     ""     ""
"TABLE ACCESS(FULL) SONO99.PROFILE"     ""     "513"     "117222"     "3047772"     ""     ""     ""     ""     ""
"TABLE ACCESS(FULL) SONO99.PROFILE"     ""     "513"     "117222"     "3047772"     ""     ""     ""     ""     ""
"TABLE ACCESS(FULL) SONO99.PROFILE"     ""     "513"     "117222"     "3047772"     ""     ""     ""     ""     ""
"TABLE ACCESS(FULL) SONO99.PROFILE"     ""     "513"     "117222"     "3047772"     ""     ""     ""     ""     ""
This query plan was taken from sql developer, exported to txt, and the PROFILE table here has only 100k tuples.
Right now I am more concerned with testing the MODEL query. Which Oracle doesn't seem to be able any more... but that is a matter for another thread.
Regarding this plan. The Union ALL seems to be more than just a binary Operator... IT seems to be Neray.
The union all on that execution plan seems to be taking as leaf tables 5 99sono.Profile tables, and be making a table scan to them all. So I'd say that the RDBMS should only scan each database block once and not 5 times.
But: It doesn't seem to be so. IT seems like what oracle is doing is scanning completly each the table, and then moving on to next select statement in the UNION ALL. Because given the amount of source table that was read, 5 times greater than the size of the source table. Oracle didn't reuse read blocks.
But this is just my feeling.Your feeling is uninteresting. Telling us what you really hope to accomplish might be more interesting.
Anyway, in terms of consistent gets, how many consistent gets should the RDBMS be doing? 5
One for each table block?It depends.
>
My best regards,
Nuno (99sono xp).

Problem with the Non-English Characters

Hello,
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> Standard fonts just have the basic English character set, with maybe a bit of help for Spanish and French.
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To be clear:
All Adobe Standard fonts support the following languages: Afrikaans, Basque, Breton, Catalan, Danish, Dutch, English, Finnish, French, Gaelic, German, Icelandic, Indonesian, Irish, Italian, Norwegian, Portuguese, Sami, Spanish, Swahili and Swedish.
Adobe Pro fonts support those languages, plus AT LEAST: Croatian, Czech, Estonian, Hungarian, Latvian, Lithuanian, Polish, Romanian, Serbian (Latin), Slovak, Slovenian and Turkish. Some Pro fonts have more language support than this, such as Greek and/or Cyrillic, and additional extended Latin.
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   Conté Crayon 12.0
   Craquelure 12.0
   Crop and Straighten Photos 12.1 (12.1x20110328 [20110328.r.145 2011/03/28:10:30:00 cutoff; r branch])
   Crop and Straighten Photos Filter 12.0.2
   Crosshatch 12.0
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   Difference Clouds 12.1 (12.1x20110328 [20110328.r.145 2011/03/28:10:30:00 cutoff; r branch])
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   Embed Watermark 4.0
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   Extrude 12.0.2
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   Google Earth 4 12.1 (12.1x20110328 [20110328.r.145 2011/03/28:10:30:00 cutoff; r branch])
   Grain 12.0
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   Maximum 12.1 (12.1x20110328 [20110328.r.145 2011/03/28:10:30:00 cutoff; r branch])
   Mean 12.1 (12.1x20110328 [20110328.r.145 2011/03/28:10:30:00 cutoff; r branch])
   Measurement Core 12.1 (12.1x20110328 [20110328.r.145 2011/03/28:10:30:00 cutoff; r branch])
   Median 12.1 (12.1x20110328 [20110328.r.145 2011/03/28:10:30:00 cutoff; r branch])
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Plug-ins that failed to load: NONE
Flash:
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   Kuler
   Access CS Live
   CS Review
Installed TWAIN devices: NONE

Communication Problem with the second battery

Hello,
In Lenovo Solution Center it says that there is communiction problem with the second battery. I already had this problem some months ago, back then it didn't charge the second battery. I got a new one and it worked again. Now it says the same thing "communication problem", but i can charge the battery and I also can't find any other sign of something not working. But still- it seems weird that the program tells me something is wrong. Can somebody help me?
Thanks Lina

Hi, Lina
What is the machine type and model of your computer? Also, what operating system are you running?
Thanks in advance,
Adam
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Problems with the Proxy Programme--Please help

Hi All,
I have written a simple proxy server in the form of a servlet. I changed the proxy config of my browser to connect to this servlet hosted on the default context(http://localhost:8080) of the Tomcat 5.0.25 . Well , this servlet internally connects to the proxy of the corporate LAN . The logic that I have applied is as follows. The servlet gets the request from the client (ie the browser in this case) , extracts the headers and contents from the request, sets them to a new request that it forms and finally send this new request to the proxy. When the proxy responds, the servlet collects the response headers and contents adn writes them in its response. To sum up , this servlet transparently carries the requests and responses between the client(browser) and the corporate LAN proxy. Now the problem is this. Let's say , now I am accessing http://www.google.com.The browser sends a request to my servlet with the following headers as they are extracted by my servlet.
ProxyServer:::>posting request
ProxyServer:::>headerValue::> headerName = accept : headerValue=*/*
ProxyServer:::>headerValue::> headerName = referer : headerValue=http://www.google.com/
ProxyServer:::>headerValue::> headerName = accept-language : headerValue=en-us
ProxyServer:::>headerValue::> headerName = proxy-connection : headerValue=Keep-Alive
ProxyServer:::>headerValue::> headerName = user-agent : headerValue=Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; UB1.4_IE6.0_SP1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)
ProxyServer:::>headerValue::> headerName = host : headerValue=www.google.com
ProxyServer:::>headerValue::> headerName = cookie : headerValue=PREF=ID=1be27c0a74f198ca:TM=1082058853:LM=1082058853:S=bu6ORrygzm8AUkm8
ProxyServer:::>postRequest
I set these headers into a new connection opened to the proxy and post a fresh request to the proxy,which, in turn responds with the following headers.
ProxyServer:::>posted request successfully
ProxyServer:::>writing response
ProxyServer:::>writeResponse-->headerName = Proxy-Connection : headerValue = [close]
ProxyServer:::>writeResponse-->headerName = Content-Length : headerValue = [257]
ProxyServer:::>writeResponse-->headerName = Date : headerValue = [Tue, 13 Jul 2004 14:01:40 GMT]
ProxyServer:::>writeResponse-->headerName = Content-Type : headerValue = [text/html]
ProxyServer:::>writeResponse-->headerName = Server : headerValue = [NetCache appliance (NetApp/5.5R2)]
ProxyServer:::>writeResponse-->headerName = Proxy-Authenticate : headerValue = [Basic realm="Charlotte - napxyclt2"]
ProxyServer:::>writeResponse-->headerName = null : headerValue = [HTTP/1.1 407 Proxy Authentication Required]
ProxyServer:::>writeResponse exiting
ProxyServer:::>wrote response successfully
I write these headers back to the client. According to what I was thinking, the client ie the browser would open a new dialog box asking for username/password owing to the presence of the "Proxy-Authenticate " header. But it does not happen that way. Rather the browser stops responsding and displays a blank page. Does anyone know why it happens this way? I am pasting the server prog below for everybody's reference.
package server.proxy;
//import all servlet related classes
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.io.*;
import java.net.*;
import server.resources.*;
//My Proxy server --->Currently it is very simplea and relies on
//other proxy servers of an already connected network.
public class ProxyServer extends HttpServlet
//stores the resource bundle
private ServerResBundle resBundle = null;
//checks for the mode of operation
private boolean proxySet = false;
private String proxy = null;
//storing the original System out/err etc
private PrintStream sysOutOrig = null;
private PrintStream sysErrOrig = null;
private InputStream sysInOrig = null;
//initialise certain features that are required later
public void init() throws ServletException
try
//initialise the resource bundle
this.initResBundle();
System.out.println("ProxyServer:::>res bundle init");
//set the mode of operation
this.setMode();
System.out.println("ProxyServer:::>mode set");
//set the system out and err --System.setOut etc
this.setSystemOutErr();
System.out.println("ProxyServer:::>in/out/err set");
}//End try
catch(Exception e)
System.out.println("Exception in init..."+(e.getMessage()));
throw new ServletException(e);
}//Edn
catch(Throwable e)
System.out.println("Irrecoverable Error...");
throw new ServletException(e);
}//End
}//End init
//method to init the resource bundle;
private void initResBundle()
this.resBundle = ServerResBundle.getBundle();
}//End
//method to set the mode of the server--proxy or direct
private void setMode()
//read the target proxy property from the bundle and
//if it is set,take that URL
String temp = (String)(this.resBundle.getResource(ResKeys.PROXY_SERVER));
if ( (temp != null) && (temp.length() > 0) )
this.proxySet = true;
this.proxy = temp;
temp = null;
}//End
}//End
//method to set the system out and err etc
private void setSystemOutErr() throws Exception
//keep a copy of the original system out and error
this.sysOutOrig = System.out;
this.sysErrOrig = System.err;
try
//read the options adn if they are set, take the values directly
String newOutStr = (String)(this.resBundle.getResource(ResKeys.SYSTEM_OUT));
String newErrStr = (String)(this.resBundle.getResource(ResKeys.SYSTEM_ERR));
if ((newOutStr != null) && (newOutStr.length() > 0))
System.setOut(new PrintStream(new FileOutputStream(new File(newOutStr),true),true));
}//End if
if ((newErrStr != null) && (newErrStr.length() > 0))
System.setErr(new PrintStream(new FileOutputStream(new File(newErrStr),true),true));
}//End if
}//End
catch(Exception e)
//restore the stuff
System.setOut(this.sysOutOrig);
System.setErr(this.sysErrOrig);
}//End
}//End
//this is where the proxy functionalities will be embedded
public void service(HttpServletRequest req,HttpServletResponse resp)
throws ServletException,java.io.IOException
//conenction URL
URL target = null;
//conenction to the remote object
URLConnection targetConn = null;
//stores the OOS and the OIS
ObjectOutputStream oos = null;
ObjectInputStream ois = null;
try
//check for the mode of operation
if (proxySet)
URLConnection objects go through two phases: first they are created, then they are connected.
After being created, and before being connected, various options can be specified
(e.g., doInput and UseCaches). After connecting, it is an error to try to set them.
Operations that depend on being connected, like getContentLength, will implicitly perform the connection,
if necessary.
//for the URL to the proxy
target=new URL(this.proxy);
//conenct to the proxy
targetConn = target.openConnection();
//set the details of the connectuon
targetConn.setDoInput(true);
targetConn.setDoOutput(true);
targetConn.setUseCaches(false);
// If true, this URL is being examined in a context in which it makes sense to allow user interactions such as popping up an authentication dialog. If false, then no user interaction is allowed
targetConn.setAllowUserInteraction(true);
//connect to the remote object
// targetConn.connect();//call this only when all the request properties are set
System.out.println("ProxyServer:::>posting request");
//post the received request to the URL
this.postRequest(targetConn,req);
System.out.println("ProxyServer:::>posted request successfully");
System.out.println("ProxyServer:::>writing response");
//receive the response
//write the received response to the client
this.writeResponse(targetConn,resp);
System.out.println("ProxyServer:::>wrote response successfully");
}//End if
else
//currently this functionality is not supported
throw new ServletException(
(String)(this.resBundle.getResource(ResKeys.ERR_FUNC_NOTSUPPORTED)));
}//End
}//End try
catch(Exception e)
if(e instanceof ServletException)
throw (ServletException)e;
}//End
if (e instanceof IOException)
throw (IOException)e;
}//End
//wrap it up in ServletException
throw new ServletException(e);
}//End
}//End
//method to write the response back to the client
private void writeResponse(URLConnection targetConn,HttpServletResponse resp)
throws ServletException
//get all the header fields from the response connection and set them to the
//response of the servlet
Map headerFields = null;
Iterator headerFieldEntries = null;
Map.Entry header = null;
//stores the input stream to the conn
BufferedReader brConn = null;
//stores the writer to the response
PrintWriter prResp = null;
//checks if the proxy authentication needed or not
boolean proxyAuthReqd = false;
try
//juste ensuring that the proxy authentication is reset
proxyAuthReqd = false;
if( (targetConn != null) && (resp != null) )
//Returns an unmodifiable Map of the header fields.
//The Map keys are Strings that represent the response-header field names.
//Each Map value is an unmodifiable List of Strings that represents the corresponding
//field values
headerFields = targetConn.getHeaderFields();
//Returns a set view of the mappings contained in this map
Set temp = headerFields.entrySet();
//Returns an iterator over the elements in this set
headerFieldEntries = temp.iterator();
if (headerFieldEntries != null)
while (headerFieldEntries.hasNext())
Object tempHeader = headerFieldEntries.next();
if (tempHeader instanceof Map.Entry)
header = (Map.Entry)tempHeader;
Object headerName = header.getKey();
Object headerValue=header.getValue();
System.out.println("ProxyServer:::>writeResponse-->headerName = "+headerName+" : headerValue = "+headerValue);
//do not select the key-value pair if both the key adn the value are null
if ( ( headerName == null) && (headerValue == null) )
continue;
}//Enmd
if (headerValue != null)
List headerValList = null;
if (headerValue instanceof List)
headerValList = (List)headerValue;
}//End
if(headerValList != null)
for (int i=0;i<headerValList.size();i++)
Object headerValueStr = headerValList.get(i);
if (headerValueStr instanceof String)
//note that the header-key can not be null for addHeader
//I have made this temporary provision to make the programme work.
resp.addHeader(( (headerName==null)? ("null_header"+i) :(String)headerName),
(String)headerValueStr);
//check if the proxy authentication required or not
if (((String)headerValueStr).
indexOf(resp.SC_PROXY_AUTHENTICATION_REQUIRED+"") != -1)
System.out.println("ProxyServer:::>writeResponse-->proxy auth needed");
//proxy authentication is needed
proxyAuthReqd = true;
}//End
}//Ednd of
else if (headerValueStr == null)
resp.addHeader(( (headerName==null)? null :(String)headerName),
null);
}//End
}//End for
}//End if
}//End if
}//End
}//End while
}//End if
//get the writer to the client
prResp = resp.getWriter();
System.out.println("ProxyServer:::>writeResponse-->proxyAuthReqd="+proxyAuthReqd);
//juste test a simple header
System.out.println("Proxy-Authenticate = "+(resp.containsHeader("Proxy-Authenticate")));
//if the proxy asks you for authentication,pass on the same to the client
//from whom you have received the request.When this flag is true,the connection
//is closed by the remotehost adn hence any attempt to open in input steram
//results in an error ie IOException
if (!proxyAuthReqd)
//now get the content adn write it to the response too
brConn = new BufferedReader(new InputStreamReader(
targetConn.getInputStream()));
String tempStr = null;
while ((tempStr = brConn.readLine())!=null)
prResp.println(tempStr);
}//End while
//close the connections
brConn.close();
}//End if
else
prResp.println("Proxy Authentication needed...");
}//End
//close the streams
prResp.flush();
prResp.close();
}//End if
System.out.println("ProxyServer:::>writeResponse exiting\n");
}//End try
catch(Exception e)
throw new ServletException(e);
}//End
}//End
//method to post request to the internet
private void postRequest(URLConnection targetConn,HttpServletRequest req)
throws ServletException
//extract the header parameters and the body content from the incoming request
//and set them to the new connection
Enumeration reqHeaders = null;
//reads the incoming request's content
BufferedReader brReqRd = null;
PrintWriter prResWt = null;
//stores temp header names and values
String headerName = null;
String headerValue = null;
try
if( (targetConn != null) && (req != null) )
reqHeaders = req.getHeaderNames();
//extract a header adn set it to the new connection
while (reqHeaders.hasMoreElements())
headerName = (String)(reqHeaders.nextElement());
headerValue = req.getHeader(headerName);
targetConn.setRequestProperty(headerName,headerValue);
System.out.println("ProxyServer:::>headerValue::> headerName = "+headerName+" : headerValue="+headerValue);
}//End
System.out.println("ProxyServer:::>postRequest\n");
//establis the actual connection
//calling this method bfore the above loop results in IllegalStateException
targetConn.connect();
//NOTE : try reading from and writing into OIS and OOS respectively
//now read the contents and write them to the connection
// brReqRd = req.getReader(); //this hangs for some reason
brReqRd = new BufferedReader(new InputStreamReader(req.getInputStream()));
System.out.println("Got the reader..brReqRd = "+brReqRd);
if (brReqRd != null)
String temp = null;
//establish the printwriter
// prResWt = new PrintWriter(targetConn.getOutputStream(),true);
prResWt = new PrintWriter(targetConn.getOutputStream());
System.out.println("trying to read in a loop from brReqRd.. ready="+(brReqRd.ready()));
while( (brReqRd.ready()) && ((temp=brReqRd.readLine()) != null) )
System.out.println("In while::>temp = "+temp);
prResWt.println(temp);
}//Emd while
//close the streams adn go back
brReqRd.close();
prResWt.flush();
prResWt.close();
}//End
}//End outer if
System.out.println("ProxyServer:::>postRequest exiting\n");
}//End try
catch(Exception e)
throw new ServletException(e);
}//End
}//End
}//End

Hi serlank ,
Thanks for your reply. Well , I initially I thought of not pasting the code,as it was too long. But I could not help it,as I thought I must show in code what I exactly meant. That's why I followed a description of my problem with the code. You could probably have copied the code and pasted it in one of your favourite editors to take a look at it. Did you,by any chance, try to read it on the browser? And as regards reposting the same message, I can say that I did it as I felt the subject was not quite appropriate in the first posting and I was not sure as to how I could delete/alter the posting. I am not asking for a code-fix,but some suggestions from some one who might ever have come across such a thing.Anyway, lemme know if you have any idea on it. Thanks...

Problems with the Fios 20/5 connection speed in my area dropping down to less than 3mbs.

I have written out a flyer that I plan to go door to door with. Since I am under contract with Verizon, I am forced to honor my side of the contract. Even if they are allowed to make me pay for a service that I am not completely getting. I am very displeased and as soon as my contract is up, I will change back to My local cable companies all in one that does not require a contract and has no issue such as the one I am having.
Do you have Verizon Fios Internet?
Are you on the 20/5 connection?
If so, you may not be getting the speed you are paying for. I am on a 20/5 connection and when my computer is on for longer than an hour the internet download speed with Verizon Fios starts to slow down until it is below 3mbs. It takes about 24 hours to get down to 3mbs but only about an hour or two to get down to about 6-7mbs when I am paying for 20mbs…
I have 3 computers in my home that have Windows Vista, Windows XP home edition and Windows Media Edition 2005. All of the computers run into this same exact issue, I have tried every setting I could think of with my 24 years of computer technical experience. I finally took one machine with Windows XP and ran a full format on the hard drive and reinstalled a fresh Windows Xp Operating system onto the hard drive so it is a bare bones OS. This way there is no other software on the machine that could possibly be causing the problem and found that when I connected online through Verizon Fios the machine still ran into the same exact issue. This proves to me that the issue is not on any of my machines.
Now all of this time my buddy that lives 1.2 miles away from my house has been having the same issue with three computers at his home also. He has Windows Vista on two machines and Windows XP Pro on one.
When I concluded that it was a Verizon Fios issue, after a few months of trying to get by, researching, diagnosing and losing much information in order to verify it was on Verizon’s side, I contacted technical support at Verizon’s online website. The agent and I went through the regular procedure that anyone would have to go through and I patiently explained what I had done to try to diagnose the issue. The agent came to the conclusion that he could not figure out the problem so he guessed that the Verizon router/modem may be the issue and told me he would send me a new one by mail.
I received the new Verizon router/modem, installed it and had to call to have it activated. Afterward it still had the same exact issue as the prior router/modem. So now we know it’s not my computers, it’s not the router/modem. My Verizon router/modem is connected right at the Optical Network Terminal (ONT), which is the box that connects the fiber-optics to your home, usually just inside or outside your garage wall. Mine is just outside…
From here my buddy, who has been having this problem also the entire time, called the local office of Verizon Fios and an installer was setup to come over to his home and trouble shoot the issue. My buddy called me and told me when the installer was headed to his home and I met him at his home to see what the installer found and in hope that my issue would be fixed at the same time. The installer went through the system at his house and was frustrated about not finding the reason for the issue and ready to leave without fixing anything. I simply asked that he stay long enough to see the issue present itself within an hour-hour and a half.
His laptop itself already showed the speed drop from 20mbs to between 16-17mbs, it was on its way down. He basically told us something that online tech support already stated to me, it is extremely difficult to prove it is on Verizon’s side. In other words it is extremely difficult to prove it, in a way that will convince Verizon to check its own servers, routers and software updates to their own systems. The installer, good guy, couldn’t/wouldn’t stay but we did convince him not to simply drop the issue. He called shop and they sent another installer out to take over the issue.
The new installer, great guy, got up to speed on what was already done at my buddies home. The first installer, checked and replaced the Verizon router/modem, checked the wiring and splitters. Basically went through the entire system up to the Optical Network Terminal (ONT), the box that connects the fiber-optics to your home. He pulled and replaced the Optical Network Terminal (ONT), thinking that perhaps the unit was compromised. While he was doing this job a tech was called and asked to stop by for assistance with the issue. The tech checked the computers inside and tried to do some settings that the main office informed him to try. I explained to the tech that the same issue was happening at my house, that I went through every setting I could think of and find online to help alleviate the issue. After some shop talk about what I had tried, including the full format and reinstall of the operating system on one of my machines, he just as I came to the conclusion that it couldn’t be with the computers and since everything that had to do with the Verizon Fios system from the street to the end-user computer had been checked, verified and/or replaced, the issue had to be coming from Verizon’s main office.
The installer had already checked the main at the road that has the 3x2 green service cover on it by the side walk. Everything was in good working order. The tech called the main office to see if my buddy and I were on the same hub, basically a big splitter that continues the service from the main office to the homes, we were not. So that was ruled out…
My understanding of the system ends there. The only other components I know of are the Main branch’s routers, servers and software.
Verizon had a new connection speed added to their system, 25/15 about the same time our issue began. So I am guessing that when they updated the system to include this new connection speed they corrupted the software for the 20/5 connection.
We have been waiting to hear from the tech that was at my buddy’s house, to see if the issue will be dealt with. My buddy has called him a couple of times and he has mentioned that he is trying to get it addressed and to call back if we hadn’t heard from him. He remembered who he and I were and what the issue was, so I believe he is taking it seriously. How far he can move the issue is beyond me…
I want to add that my buddy and I have been customers with the all in one package from Verizon Fios since their services have moved into our area, about a year and a half… It has only been since about June that this issue has presented itself, before then we were on 7th heaven with the speeds. We couldn’t have been more than happy with the services.
This issue has caused that to all go afoul, not only do the speeds get down to less than 3mbs but the speed is not smooth at all. Rather the 3mbs speed is stop and go, freezing in between at times, very choppy. Barely usable at times, unless you restart the computers and start over.
We are hoping that anyone with Verizon Fios Internet Services will keep an eye on their speeds by going to http://speedtest.net and doing tests to verify they are getting the speeds they are paying Verizon for.
This is what it will take for Verizon to take this issue seriously is to gather everyone on the system that may be having the same issue. I believe it is everyone that is within the 1.2 miles from my house to my buddy’s and will distribute flyers to each and every house in between.
If you find that your speed is not as fast as it should be please contact me and I will add you to the list, this way we can see exactly how far this problem covers and perhaps it will also help to show a pattern and understanding as to why the issue is present in the first place.
My contact information,
I have left this out here, you can contact me on these forums...

Actually what this came down to was an issue between Windows Vista and an Ethernet Card on one of the machines in each of our local networks.
Even though our two machines are 6 years apart, we both have the same ethernet adapter on our main desktops. A RealTek RTL8139/810x Family Fast Ethernet Nic. It seems that the adapter does not work at the 20mbs download speeds with Vista. For some reason the adapter does not shut down when the computer does? I don't understand why but it doesn't, it keeps the connection alive. I removed the ethernet cable and pulled the power cable and had my two other computers still connected to the network and found that the issue was resolved. The way I found out was that I used the connections on my main computer to hook up one I had laying around and through further testing found the problem no longer existed...
Then I realized that my buddy and I installed Windows Vista at about the same time, a couple of months ago. Funny how you can forget an important detail like that. Then I remembered that he had the same identical ethernet adapter as I did, I had noticed that while trouble shooting his computer at his home but didn't think it was important at the time. Until the issue was narrowed down to the adapter, then it all seemed to all fall into line.
Quite humbling... In the end, anyone who has Windows Vista and this NIC probably will have problems with the 20mbs download speed of the computers on their own networks. I tried the latest Vista driver from RealTek and also tried to roll back the driver, with no success....
Back at the beginning when we first had fios installed in our homes there wasn't an issue when we had the 10/2 speeds and had Vista. Then we decided to change from Vista to XP because we both were having issues as to what programs you could use and which you could not, shortly after having fios installed. Then when verizon upgraded us to 20/5 we were amazed at the speed and still had no issue because we had XP on our main computers with the RealTek adapters...
We reinstalled Vista because it seemed like we were having more issues with XP by getting hit with Antivirus2008 and its variants and thought it time for a change back...
It didn't really hit us that Vista could be the culprit because we both have a laptop in our networks that have had Vista on them from the get go when there were no issues... We also didn't notice just how bad it was right away and over time kind of left the Vista install out of the equation.
Just strange that one computer can effect all the other computers on the network, even when it is shut down...
I allowed the other two computers to run 24hours and the issue did not present itself, when I added the main computer with the RealTek adapter back to the mix it reappeared. The Realtek adapter is the only real common denominator between his machine and mine.
So now we have three choices,
We can go back to Windows XP.
We can buy a new NIC or a wireless card to replace the RealTek...
Hopefully this post will help anyone else who runs into this problem, it has been very frustrating to say the least...
Thanks to everyone for their help and I apologize for complaining about verizon when it was not a verizon issue. I came to the conclusion that the only part verizon really played was upgrading us to a 20/5 tier which I am thankful for...
Would be nice if this card was on a list that Verizon support could use to troubleshoot , diagnose or eliminate for future support issues.
Message Edited by keiser0619 on 08-06-2009 03:58 PM

Problems with the iPod Touch (sound)

Hey,
I was wondering (more like desperately hoping) someone can help me with my problem.
I've had my iPod touch for almost 2 years now but lately I've been getting problems with the sound.
When I bought the iPod, I bought some decent sennheiser plug-in earbuds too, because I find the one's delivered with the ipod pretty low quality.
For over a year, I loved my ipod touch (it's my second one) but one day, for some unknown reason, my sound was at not even half of the usual volume.
I've checked the settings but cannot find the problem, so I tested the ipod ears delivered with the ipod since they were new, same story (the left earbud was slightly louder than the right for some time but not too long, then they both gone quiet).
I've checked on the internet before and someone said "try jailbraking your ipod, because that sometimes helps, so I did but no effect.
So I set it back to fabric settings and went to a switch store, they listened and found it odd too so they send it in because it was still under guarantee.
Now (today), I've gotten a completely new ipod touch 16 Gb. So, happy as I was, I went home to put my music on it, and what happens? The sound is slightly louder than the previous one but still WAY too quiet! If I'm on the bus, its no use listening to it because I cant understand the lyrics cause of the background noizes the bus makes... Its p*¨ssing me off bigtime that its still way too quiet, anyone got any ideas how to fix it?
Please don't send useless reply's like get ya ears checked because Im in the army and they get checked regularly and they are perfectly fine!
Maybe with someone knows some other program or app that I can use so I can fix this very irritating problem?
I have had 6 iPods before, from the first one that came out to the ipod touch 16 Gb, and its only with this one that Ive started having problems about a year ago.
Plus my girlfriend has an ipod too (not a touch) and on her ipod, everything works fine, my earbuds included :s
Please help!
Thanks in advance!
Toby

Omg, I've put over 2 hours of work in it to reinstall other versions of itunes, ios n such to then find out that they DID NOT test my ipod and sennheiser earbuds that I gave in along with my busted itouch.... They told me they work fine... Now I took my girlfriends earbuds cause nothing worked, turned out they are both broken and now I need to go back to the store for new ones, dont think that the previous itouch wasnt busted then after all cause it was, tried with 10 different sets of earbuds
anyway Im a happy man again with a decent itouch and good earbuds, that I can lend from me girlfriend...
Thanks for the help anyway

Two new problems with the Quicktime Plug-in

I recently discovered two new problems with the current Quicktime Plug-in for Mac OS X.
First, the Quicktime Plug-in is unable to stream Quicktime media in any internet browsers other than Safari.
There is just nothing on the spot where the embedded Quicktime player should be.
Second, the Quicktime Plug-in only shows the message "The operation couldn't be completed. This file is not a movie file (-2048)"
everytime it should work together with the Flip4Mac Plug-in. The thing is, when facing a webpage where a wmv or wma file is
embedded, there only shows that error message on the spot where the player should exist. I first thought that it would be a
problem with Flip4Mac. So I uploaded about this problem on telestream.net, only to hear that the error message above belongs
to the Quicktime Plug-in.
Both of these problems did not happen at all only three weeks ago. The embedded Quicktime player showed up without any problem
in my Firefox and Opera, and wmv or wma files were streamed successfully through the Flip4Mac and Quicktime Plug-ins.
Then, suddenly, after some point, these two problems began to occur, and there is no information on how to solve them on the web.
I obviously tried uninstalling and reinstalling Quicktime. I even completely erased the hard disk of my Macbook, and reinstalled the
whole Mac OS X. But the problems still remained. I borrowed another Macbook from my friend to check whether these problems
occur in other computers, and they did occur in my friend's Macbook as well. So they are definitely not the matter of my own Macbook only.
I think these might be the problems with the new Quicktime Plug-in 7.7.1.
Please check about these problems and solve them on the next version of the Quicktime Plug-in.
I will give you a couple of hyperlinks so that you can check about the problems directly.
http://blog.naver.com/dbswhddlf1?Redirect=Log&logNo=130025903581
↑ This link is for the first problem (the embedded Quicktime player not showing up in any browsers other than Safari)
http://blog.daum.net/wellabc/15434322
↑ This link is for the second problem (the error message showing up on the spot where a wmv or wma file should be streamed)
p.s: I am sorry that I am Korean.

I recommend that you repeat all this via
http://www.apple.com/feedback/quicktime.html
to make sure that Apple will see it.

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