Possible Bug in Java Binding of BDB

I came across a situation where I had opened a database with a unique DatabaseConfig object with an appropriate error prefix. I encountered an error on insert and got a message back from the JNI layer complaining about unsupported duplicate keys.
This part is great. I want to know about the error. The puzzling thing was that the prefix of the error was from a different database config than the one associated with the table itself which lead to some confusion. In fact it was reporting with whatever config the last database was opened with.
I was wondering it perhaps com.sleepycat.db.DatabaseConfig line 516
should read:
516 configureDatabase(db,this);
517 db.open(txn, fileName, databaseName, type.getId(), openFlags, mode);
as opposed to:
516 configureDatabase(db,DEFAULT);
517 db.open(txn, fileName, databaseName, type.getId(), openFlags, mode);
Most likely it is more complex than that so let me know if you need additional information in order to reproduce the bug.
Great product!
Ciao
Topher

Hi Topher,
It seems likely that the behavior is as described here:
http://www.oracle.com/technology/documentation/berkeley-db/db/java/com/sleepycat/db/DatabaseConfig.html#setErrorPrefix(java.lang.String)
The relevant section:
For Database handles opened inside of database environments, calling this method affects the entire environment and is equivalent to calling EnvironmentConfig.setErrorPrefix.
The message string is environment wide, not per database. So all error messages will have the prefix as was set in the last setErrorPrefix call.
If that does not explain the behavior you are seeing, please clarify the issue. With at least a description of the code, preferably a sample application.
Thanks,
Alex Gorrod, Oracle.

Similar Messages

A possible *bug* in java jcombobox

Hi all,
I think i found a possible bug in java jcombobox .. i am sure some of you must have already experienced it..
supposedly you put a jcombobox in a jpanel
returned the panel from a method to a calling method..
and that method adds it to another panel that it had created to a frame..
and if this happens dynamicaly at runtime, as only after u click a button..
meaning : without adding the combobox or the immediate parent panelto the contentpane .. directly..
Then,
your combox's keylistener may not catch events fired.
.. this has happened to me many times.. and always i could only find a way out
.. by adding the combobox to panel that is loaded during startup itself and is
.. not returned through a method call.
Your opinions please ?
'Harish.

All components in a UI are created at run-time.
When you create your JFrame you call pack() to align and resize the UI. This validates all the components, and sets the default focus on what ever component should have the focus at start up.
When you create components and add them as children of another component you have to validate the child and parent. This can be done by calling JComponent.validate()
As for keylisteners not getting called, this might be fixed if you call grabFocus on the new combobox. I can't see a reason why any listener would stop working.
For me to really understand what your talking about. I'd need to see source code reproducing this problem.

A possible bug in Java 5.

import java.util.*;
public class Test {
   public static void append(List list) {
      list.add("abcd");
   public static void main(String[] args) {
      List <Integer>list = new ArrayList<Integer>();
      append(list);
9:   System.out.println(list.get(0));                                      // Print out abcd normally
10: Object obj = list.get(0);
11: System.out.println(obj.getClass().getName());                // This line is fine and output java.lang.String
12: System.out.println(list.get(0).getClass().getName());       // This line throws ClassCastException
}Look at the above code. list is defined to be a list with only Integer type, but the append method add a string inside with no exception. So line 9 print out abcd normally. When we check the data type of the first element of list, line 10 and 11 gives the correct type java.lang.String. However, if we use line 12 which combines line 10 and 11 to a single line, the system will throw java.lang.ClassCastException. Then we check all the methods in line 12 in Java API and find that no method throws ClassCastxception. I think this could be a bug in Sun Java group. Can anybody explain this?

Yupei wrote:
I never said it will not compile. You code can also be compiled correctly. But it will throw ClassCastException during the run time.Which is good.
Again, for this code, I intensively abuse generic type of List. The ClassCastException during the run time is reasonable. My issue is, since in Java API, no methods throws ClassCastException, why this code throws such an exception?The generated bytecode includes a checkcast instruction on line 12.
Should the Java group needs to modify their code to fix this problem? Because line 12 is a combination of line 10 and line 11, they should be equivalent. But one is good and the other throws exception, this does not make any sense to me.I don't know that it is a problem. My guess is this:
With this line
Object obj = list.get(0);there's no checkcast, because type inference tells the compiler that we are expecting get() to return an object.
But with this line
System.out.println(list.get(0).getClass().getName());there is a checkcast. It's a List<Integer>, and we're not telling it to treat it as an obejct. I'm not sure of the details of type inference, so I don't know if this specific behavior is intended. However, if there is a problem, it's certainly not that throwing the CCE is wrong.

A bug in Java

I would like to report a bug in Java.
It began with the rmi tutorial on computing pi.
I had no problem with this on a single computer but could never get it to work over the network. I posted messages on this forum and got lots of generous help, especially from Genady, but eventually I left it as an unsolved problem.
Yesterday I came back to my local network with my current problem and had problems similar to pi. Now at least I have more experience and I could track it down. It looks like a Java bug to me.
The hardware is: 1 router, behind which sit 2 computers: home-ilan at 192.168.2.100 and home-yona at 192.168.2.103. I have a client-server setup via rmi. If the server is on home-yona, all works OK. If the server is on home-ilan it fails. What could be the difference?
It turns out that home-ilan (my main computer) also has the possibility to run VPN to the hospital. The VPN uses a given IP. If I need to get to the hospital, I use the VPN. If not, I don't use it.
Yesterday I put Eclipse on home-yona and looked for the problem. It turns out to be in
Query q1 = (Query) Naming.lookup(rmi1);I was running the query from home-yona to home-ilan. I got a valid q1 back, and I drilled down into it. One of the elements is
ep=TCPEndpoint which has a host value.
The host value should have been 192.168.2.100, but instead it was the value of the VPN. The packet was sent from 192.168.2.100 to 192.168.2.103 and home-yona picked up the packet correctly, but it had the wrong value of the host. When I actually made the query to rmi, it expected the result from the VPN IP, which it never got, so it timed out.
The bug is that Naming.lookup, even though it got the packet through the LAN, gave VPN address. This would have been fine had I been querying from the hospital, but I was in fact doing a local query. The Naming.lookup doesn't differentiate, which is a bug.
The bug is 100% reproducible. If I start the server while VPN is running, from home-yona I will always get the VPN IP. If I start the server while VPN is turned off, I will get the correct address.
Any suggestions?
Ilan

If that were the only thing which was wrong, we'd be in great shape. It is then a bug of Cisco Systems who supplied the VPN. I just took the default conditions and used them. I had no idea there was any problem until I ran the RMI protocol.
In fairness to Cisco Systems, I must say that it is unusal to say that I want a VPN connection into the hospital and at the same time make a connection over my local LAN. In fact it works for everything I happened to try up until now, but it fails for RMI (because of the static assignment).
The amazing thing is that with all these incompatible programs is not that sometimes it fails, but that it works at all. When I look at the Control Panel, I see 2 LAN connections, my local LAN and the VPN. I suspect I would have a very similar problem if I had 2 physical LAN cards.
The home-ilan identifies the computer and it doesn't identify the computer-lan combination.
What the RMI wants is not the computer identification, but rather the lan card identification. At least in the Control Panel, such a thing doesn't exist.

Bug in java arrays?

Hi, just found this in a toy program and thought it might be a bug in the way java handles arrays... I'm working on Suse 8.0 & jdk 1.4, Red Hat 7.x/8.x with jdk 1.4 and Solaris 4 jdk 1.4:
If you have a method like this:
    public static void resize(int[] arr, int size) {
        int[] tmp = arr;
        int iterate;
        arr = new int[size]; // disassociate tmp from arr
        iterate = size > tmp.length ? tmp.length : size;
        for(int x = 0; x < iterate; x++) {
            arr[x] = tmp[x];
    }and try to call it from another class like this:
        /* could this possibly be a bug in java??? */
        Arrays.resize(state, state.length + 1); // make array bigger
        state[state.length - 1] = start; // store current room in arrayI get an ArrayIndexOutOfBoundsException on the call to assign start to the last index of state, which means that the new array knows its new length, but can't assign to it.
The solution to my problem was to return arr in the resize() method and assign the returned value to state.
This seems to go against what its supposed to happen (that the array is rezized and the pointer just updated)
Is this a bug in java or is it te desired behaviour?
dave.

But when I create the 'new' array I'm assigning the
pointer to the place where the previous array pointer
was... This should be completely legal. Yes, it's completely legal, but it doesn't do what you want :)
The variable in method to which you assign a new and longer array is a different one than the pointer you have in another method.
If you just call a function to assign values to an
array like this:> public void update(int[]arr){
arr[0] = 2;
} > and then use some code to look at the array you
passed: > int[]x = {1,2,3,4};
update(x);
system.out.println(x[0]);> you would expect to get 2 in the
output. Whay should this operation be different?Because in this case you wrap the reference you change (slot 0 in the array) into another object (the array). Therefore the reference you actually change is the same as the reference you expect to change.
If you let your resize method return the new and longer array, and assign the returned value to yor old variable, you might get a better result.
(And System.arraycopy may be more efficient than your for loop.)

Any way to comment or watch a bug for Java???

Hello!
AFAIK, at bugs.sun.com it isn't possible to comment on bugs, watch them or vote for them anymore.
I found out there's now https://bugs.openjdk.java.net but I can't find any way to register.
So, how the hell I can follow the progress on bugs? Or add additional information if I have?
It's unbelievable that in 2013 we are still unable to have a decent bug reporting system for the JDK/JRE!!!!!
Mauro.
P.S.: I know this might not be the best section for this kind of question, but I couldn't find anything better in these forums...

Other than physically looking for it, sorry, no.

Possible Bug: Migrating 6.1 to 7.0 - Uninstall of 6.1 removes 7.0 services

This is a report of a possible bug. We are migrating from 6.1 to 7.0u2. On our Admin Node, we finished migrating multiple instances from 6.1 to 7.0 so we went uninstalled the 6.1 server components. This uninstall process removed the 7.0u2 services though not the instances from the Admin Node. The configuration folders in the 7.0 folder were not removed so we were able to delete then redeploy the instance. Note that the service name in 6.1 was the same as the service name in 7.0 (e.g. https-xyz). However, we had already used the 6.1 Administration Server to remove each individual 6.1 server prior to migrating the configuration to 7.0.

sriram.natarajan wrote:
hi
what do you mean by "removed the services" but not the instances ? The uninstaller for the "Sun ONE" web server removed the Windows Services for the multiple instances that I created for the "Sun Java System" web server.
If I am not mistaken, you probably didn't completely go through the migration log to make sure that what is migrated and what is not. please note that as part of migration all static content files and some other data files are not migrated. you are required to look into the migration log and make sure that you manually move those files into 7.0 location once the automated migration completes successfully. so, if you removed the 6.0 without migrating those static files , then you might see a whole bunch of 404 and other weird errors. Static content files have nothing to do with what I'm talking about. I had a 6.1 installation with a number of "servers" (what 7.0 calls instances). In order to migrate and keep the same service name (e.g. https-xyz), I had to first make a copy of the https-xyz configuration directory, use the 6.1 admin to remove the https-xyz (this would remove the https-xyz service), recopy the https-xyz configuration directory to the 6.1 install directory, then proceed with the automated migration.
for more information, on what is migrated and what not, please refer to
http://docs.sun.com/app/docs/doc/820-2201/gbhfb?l=en&a=view
also ,please refer to the next link on the above pages related to 'files requiring manual migration'Once all my 6.1 instance migrations were complete and all that was left running from 6.1 was the Administration Server, I used the "Add/Remove Programs" control panel to uninstall the "Sun ONE Web Server 6.1" program. This uninstall process removed the Windows services created for the "Sun Java System" web server but did not remove the instances from the "Configuration Store" for the new web server.
Unfortunately, the bug that I am reporting above has nothing to do with "a whole bunch of 404 and other weird errors. "

Printing a ProcessingInstruction, possible bug

We are trying to store a DOM parsed Document in a VarChar2 field in a Oracle 8.1.6 table.
The problems we have are with a processing instruction that looks like this:
<?xml version="1.0" encoding="UTF-8"?>
The print method of the oracle.xml.parser.v2.XMLDocument generates the following:
<?xml version = '1.0' encoding = 'UTF-8'?>
Note that the double quote is changed to a single quote. Is this a bug?
We have a nasty workaround included below.
// Hekan.
package oracle.xml.parser.v2;
import java.io.StringWriter;
import java.io.PrintWriter;
import java.io.IOException;
* Class used to fix a possible bug in printing a processing instruction with the
* XMLPrintDriver
public class HitsPrintDriver extends XMLPrintDriver {
public HitsPrintDriver(PrintWriter writer) {
super(writer);
* Method overridden to fix the printing
public void printProcessingInstruction(XMLPI xmlpi) throws IOException
StringWriter writer;
XMLOutputStream xmloutputstream;
writer = new StringWriter();
xmlpi.print(new XMLOutputStream(new PrintWriter(writer)), false);
String s = writer.toString();
out.writeChars(writer.toString().replace('\'', '\"'));
out.flush();
null

for xml both are the same, so, you don't have to worry about it.
Hadar Paiss

Possible Bug In Apex 4.0.2

Hi Everyone.
I would like to report what I think is a bug in Apex 4.0.2.
If you go to my workspace on apex.oracle.com:
Workspace = EEG
Username = [email protected]
Password = galaxy (all lowercase)
Run the application: 37796 - Elie_Various_Goodies [no credentials are required]
This app was imported from my 4.0.1 workspace at my job. On the page I created two Date Picker items, P1_BEGIN_DATE and P1_END_DATE. I set them up so that whenever a user selects a begin date, a dynamic action "MANAGE_DATES" fires and automatically sets P1_END_DATE to this selected begin date value. Now when a user goes to select an end date, the displayed calendar starts at the previously selected begin date rather than the default of "Today".
All of this worked fine on my office (4.0.1) workspace. However, after exporting this app and then importing onto apex.oracle.com, none of this functionality would work. Even worse, whenever I try to select a begin date or even an end date, the selected dates never make it into the date picker fields. Displaying the "Session" window shows these fields as empty.
It was only after I copied the two date picker fields and also re-created my dynamic action (P1_BEGIN_DATE2, P1_END_DATE2, MANAGE_DATES) did my functionality return.
This behavior is quite strange. I can only think this is some sort of bug attributed to the export/import process when exporting a 4.0.1 app into a 4.0.2 workspace. I am not sure if this bizarre behavior happens with non-date picker items. Nor am I sure if this beavior would be repeated if I export/import from 4.0.2 into the another 4.0.2 environment.
Another strange thing I noticed. If I change my date picker items to be "date picker (classic)" type items, the dynamic action does not work at all. This is true in both 4.0.2 and 4.0.1. I'm not sure if this a bug or not. It could be that the classic date picker is just not "javascript" enabled so to speak. If that is true, then it would have been nice if the docs would have warned us about this.
Has anyone else seen this behavior?
Thank you.
Elie

Hi Joel.
First let me thank you for the warning about allowing "everyone" access to my workspace.
You're correct, of course. Anyone could destroy anything within my workspace. I guess I was too trusting especially as I have seen many posts on the Forum where others have given access to their workspace so that responders can offer help. I really should be more discreet about this. Again, thank you. Needless to say, I have changed my password.
With respect to the possible bug, the MANAGE_DATES dynamic action is intended to be a submit page because that is the only way I can see to get BOTH the P1_END_DATE date picker item as well as the end date textual field to be assigned the selected P1_BEGIN_DATE. I tried to use a dynamic action in which javascript sets the value of the end date textual field to the selected P1_BEGIN_DATE value. This works without the need to submit the page. Unfortunately, this does not cause the P1_END_DATE date picker item to default to this value. Instead, the default remains at today's date. This is why I finally resorted to a dynamic action that submits the page whenever a new value is selected (that is, a "change" event) from the P1_BEGIN_DATE date picker item.
All of this works in my office 4.0.1 environment. However, I was puzzled when this fails under 4.0.2 on the hosted web site at apex.oracle.com. This is why I posted a "possible" bug in 4.0.2.
I hope this all makes sense.
One more thing, as already mentioned in my original post, this "defaulting a date picker" functionality does NOT work at all for the "classic" date picker items in both 4.0.1 nor in 4.0.2. I realize one can implement this functionality (I' guessing) my using, say, a "onChange" javascript call to submit the page. It's just funny that the "classic" date picker items are not acted upon by the dynamic action MANAGE_DATES that submits the page.
Thank you.
Elie

Would anybody know if it is possible to do a binding on a const ....

Hi there,
Does anybody know if it is possible to do a binding of these two items on a InputBox ??? and if yes could you help in how to do it please.
Any help would be greatly appreciated ! regards aktell2007
private const LOAD_DELAY_STARTOne:int = 400;
I need to pass the Integer value via a InputBox.
and the same here
private var timerOneDelay:Timer = new Timer(15000, 1);
I need to change the 15000 at times.

YES, you right what a mistake do I need to kill myself now because of it ? It was the last thing I did last night and I was maybe not thinking that strait any longer just can't see why the agro.
Anyway, we are not any further yet are we so how if we change it to a var go about it you seem to know ! addressing the Integer 400 and the 15000 as well ?
regards aktell2007

Is this a bug in Java!

int i=0;
i=i++;
System.out.println(i);
What should this code print.
I guess 1.
But it prints 0.
Can anyone explain the logic behind this, or is this a bug in Java.
Thanks for your time in advance.

What did the mackerel do to deserve that?it wrote Sun's search function !!!!!! :pPlease, a mackerel would of done a better job.
All I can say is "JTable project", smiles.
(Gah, Please kill me)mlk BANG BANG*
*Post decease operator.

Possible bug found in Mac Os X Tiger 10.4.11 in conjuction with iPod Touch

Dears,
I think I've found a possible bug in Mac Os X version 10.4.11 in conjunction with iPod Touch.
When the iPod is connected during boot, my Bluetooth hardware fails to be detected. When I restart the portable without the iPod connected, my Bluetooth hardware is recognised & activated again. It is reproduceable.
1. Attach iPod Touch before starting the MacBook Pro
2. Boot the Macbook
3. Bluetooth hardware should be rendered inoperative
Restore functionality:
1. Detach the iPod Touch
2. Reboot the portable
3. Bluetooth hardware is restarted / recognised.
Regards
Cedric

wrong category

Possible Bug with Drag-and-Drop Being Published via HTML5 - Getting "Undefined" Error When Dragging Object

Hello,
I came up with a way to use drag-and-drop interactions that will take advantage of file input so that I may create a drag-and-drop interaction that uses one draggable object over and over allowing multiple scoring/tracking possibilities. Example use...is having the draggable object be dynamic in that it randomly changes its text so that a learner can drag a term it's possible classification.........thus allowing the possibility of having many terms easily loaded without having to redo a drag-and-drop interaction for each needed terms/classifications updates/changes.
My Issue: When using a variable to represent the text for a draggable Smart Shape object, I'm getting the error message "undefined" when, clicking/pressing on the object, as well as during the drag of the object. This issue occurs when publishing the project in an HTML5 format. Flash interestingly enough seems to work perfect...but we are not interested in publishing via Flash any longer.
To better help you explore this error message, I've set up a test project so that you can see when and how the "undefined" message shows up during a drag-and-drop interaction. I've also included the Captivate 8 project file used to make the exploration project I'm sharing in this post.
Link to Captivate project I created for you all to explore "undefined" error message": http://iti.cscc.edu/drag_and_drop_bug/
Link to this Captivate 8 Project file: http://iti.cscc.edu/drag_and_drop_bug.cptx
It's pretty interesting how things react in this demo, please try the following actions to see some interesting happenings:
Drag the Yellow (or variable drag box) to the drag target.
Drag Black Hello square to Drag target and click undo or reset - watch the undefined message come up on the Yellow (or variable drag box).
Drag the Yellow (or variable drag box) to the drag target and then use the undo or reset.
Move both draggable boxes to the drag target and use the undo and reset buttons...
Anyhow, I know you all are sharp and will run the demo through its paces.
I'd really be very honored if anyone help me figure out how I could (when publishing out to HTML5) no longer have the "undefined" error message show up when using drag-and-drop with a variable for shape text. This technique has been well received at the college I work at...and I have many future project requests for using such an idea on a variety of similar interactions. I'd love see a solution or see if this might be a bug Adobe may be able to fix!
I tried to find a solution to the issue documented here for quite some time, but I was not able to find anyone with this problem much less attempting the idea I'm sharing in the help request - save the darn "undefined" message that comes up!
Many thanks in advance for any help and/or direction that you all may be able to provide,
Paul

Hello,
I just wanted to supply a minor update related to my drag-and-drop question/issue stated above:
I did another test using Captivate 7, and found that the undefined error (publishing as HTML5) does not appear and the variable data remains visible - except the variable data turns very small and does not honor any font size related settings.
I did go ahead and submit this to Adobe as a possible bug today.
Thanks again for any help related to this issue. If the issued documented above is solved, it will allow many amazing things to be done using Captivate's drag-and-drop for both regular type projects as well as interaction development for iBooks!
Matter of fact if this issue gets fixed, I'll publish a Blog entry (or video) on way's I've used Captivate's drag-and-drop to create dynamic learning activities for Higher Ed. and for use in iBooks.
~ Paul

Possible bug: Saving array with extended and double precision to spreadsheet

If one concatenates a double precision array and an extended precision array with the "build array" vi and then saves using "Write to Spreadsheet File" vi any digits to the right of the decimal place are set to zero in the saved file. This happens regardless of the format signifier input (e.g. %.10f) to the "Write to Spreadsheet File" vi.
I am on Vista Ultimate 32 bit and labview 9.0
This is a possible bug that is easily circumvented by converting to one type before combining arrar to a spreadsheet. Nonetheless, it is a bug and it cost me some time.
Solved!
Go to Solution.
Attachments:
Spreadsheet save bug.vi ‏9 KB

Hi JL,
no, it's not a bug - it's a feature
Well, if you would look more closely you would recognize the "Save to Spreadsheet" as polymorphic VI. As this polymorphic VI doesn't support EXT numbers internally (it only supports DBL, I64 and String) LabVIEW chooses the instance with most accuracy: I64 (I64 has 64 bits precision, DBL only 53...). So your options are:
- set the instance to use as DBL (by right-click and "Select type...")
- make a copy of this VI, save it with a different name and make it support EXT numbers (don't rework the polymorphic VI as you would break compatibility with other LV installations or future revisions)
And yes, those coercion dots always signal some conversions - you should atleast check what's going on there...
Message Edited by GerdW on 05-21-2010 10:01 PM
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

Possible bug? formatted number 0 displays as 4,294,967,295

This is really two questions in one. First, I have a routine
that sometimes provides a result of 0, which is *sometimes*
displayed in an AdvancedDataGrid column as 4,294,967,295, which I'm
assuming is somehow a meaningful number (largest int?). Anyway, I
have an ADG with a column defined as:
<mx:AdvancedDataGridColumn headerText="Remaining work"
labelFunction="rem_work_fmt" textAlign="right" />
The labelFunction called is shown below:
private function rem_work_fmt(item:Object,
column:AdvancedDataGridColumn):String
var num:String =
numberFormatter.format(item.get_remaining_work());
trace ("result: " + num);
return num;
The trace output prints: "result: 0" as expected, but the
number displayed in the grid is sometimes 0 and sometimes
4,294,967,295.
More weirdness, this only happens to the last column in the
ADG. I call the same format logic on a different column and have
never seen the wrong result. Also, the same underlying function
"get_remaining_work()" is called elsewhere on the same data and the
result is correctly displayed in a text field as 0.
Second question, I've run into some other possible bugs,
which I haven't reported because I found a work around. How does
one do that in the beta program?

lw1001,
Bugs can be filed in the public bug base at
http://bugs.adobe.com/flex/
You'll need to sign up before you can submit bugs.
Also, if you can attach the bug files to the bug report, it
makes it a lot easier for Adobe to investigate.
Let me know if you have any further questions/problems.
Peter

Possible Bug in Java Binding of BDB

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