php-java-bridge-users Mailing List for PHP/Java Bridge

Hi,

>       java.lang.Exception: Invoke failed:
>
[o(ApiOrganizationHome)]->findOrganization((IOrganizationWhere)o(ApiOrganizationWhere)).
> Cause: Failed reading response from the server.
>   Nested exception is:
>         java.lang.OutOfMemoryError: Java heap space

I think, the OutOfMemoryError happened in the EJB
business logic, not in the JVM running the bridge
backend. I assume the findOrganization is a EJB finder
method?

I haven't had OOM errors in the bridge backend for
some time now, but if I remember correctly the bridge
reports an OOM in its VM via:

JavaBridge ERROR: OutOfMemoryError

After that all clients should abort immediately
because the backend closes all connections to recover
from this. The above formatted error string ("Invoke
failed") makes me believe that it's not the bridge
backend that reported the OOM, but the component to
which the backend is connected, an EJB container
probably(?).

Can you please open a problem report (please use
http://sourceforge.net/tracker/?func=add&group_id=117793&atid=679233)
 and attach the exception message from the
JavaBridge.log (on RHEL the log file is
/var/log/php-java-bridge.log) there?

We'll look at this asap.


Regards,
Jost Boekemeier



	

	
		
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Hi,

thank you very much for this bug report. As a
workaround please move the jar file (which references
or contains the native library) to
$JAVA_HOME/jre/lib/ext and re-start the backend. 


> When the php page is loaded, everything is OK. But
> when i refresh the page,
> it shows the error as below
> Native Library /usr/lib/libsfount_api.so already
> loaded in another
> classloader"] 

that's an interesting problem. At the moment the
dynamic loader can only load pure java libraries.
When GNU java is used (gcc/gcj), it can also load
native libraries.

The SUN java VM cannot load a native library twice. I
think this means that we must lock the classloader,
when we're asked to load a dynamic library. The loader
will remain locked and all further classes and
libraries will be loaded via this loader until
finalization.

I will check this for version 3.0.8, please see PR
1447360
(http://sourceforge.net/tracker/index.php?func=detail&aid=1447360&group_id=117793&atid=679233)

Until then please use the above workaround.


Regards,
Jost Boekemeier


	

	
		
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Hello all,

I've been building an application that provides a front end for a HP
product called service desk.  WE had this error last night,

      java.lang.Exception: Invoke failed:
[o(ApiOrganizationHome)]->findOrganization((IOrganizationWhere)o(ApiOrganiz=
ationWhere)).
Cause: Failed reading response from the server.
  Nested exception is:
        java.lang.OutOfMemoryError: Java heap space

I'm running the JVM as a service.

As far as I understand it, all java objects should be gabage collected
after a script finishes (no more references).  But I've been seeing
the resident memory usage of the Java service gradually increase as
the requests go in, and it doesn't go back down.

Anybody got any pointers or help they can give?

Thanks,

Paul.

Hello!

I seem to have the PHP Java Bridge (php-java-bridge_3.0.7a) working with PH=
P
5.1.2 on my CentOS server with Apache 2.0.53. I think all configuration is
OK, but it still has some problem at run-time.

When the php page is loaded, everything is OK. But when i refresh the page,
it shows the error as below

*Fatal error*: Uncaught [o(Exception):"java.lang.Exception: CreateInstance
failed: new StreamFountJava.SFountAPI. Cause: java.lang.UnsatisfiedLinkErro=
r:
Native Library /usr/lib/libsfount_api.so already loaded in another
classloader"] thrown in */home/mbos/php_java.php* on line *10*

StreamFountJava.SFountAPI is a java package. I have made the
StreamFountJava/SFountAPI.class as *.jar and stored it under
/usr/share/java/. Also the *.jar is in my java_require() path.
libsfount_api.so is the dynamic link libraries for the java to invoke.
It has been loaded by System.loadLibrary() in the SFountAPI.class.

This is the php-java-bridge.log:
Mar 10 16:09:22 JavaBridge ERROR: Exception occured
java.lang.UnsatisfiedLinkError: Native Library /usr/lib/libsfount_api.so
already loaded in another classloader
        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1551)
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1482)
        at java.lang.Runtime.load0(Runtime.java:737)
        at java.lang.System.load( System.java:811)
        at StreamFountJava.SFountAPI.<clinit>(SFountAPI.java:24)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance (
NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(
DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java :274)
        at php.java.bridge.JavaBridge.CreateObject(JavaBridge.java:515)
        at php.java.bridge.Request.handleRequest(Request.java:406)
        at php.java.bridge.Request.handleRequests(Request.java:425)
        at php.java.bridge.JavaBridge.run(JavaBridge.java:207)
        at php.java.bridge.ThreadPool$Delegate.run(ThreadPool.java:29)

Why every time i refresh my page, the Fatal error will be shown? How can i
release my dynamic link libraries from the classloader or avoid the error?
I also try to use java_reset() at the top of my php page, but it seems that
it doesn't work.

I'm sorry for my poor english, because english is not my native language.
But trust me, I'm trying my best. Please help me anyway!

Best regards to you!
Thank you!