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

> Can you please remove any "[java]" entry from your php.ini file(s) and try again?

I meant: please remove all java entries. :)








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Hi,

> require_once('Java.inc');


        at java.net.SocketInputStream.read(Unknown Source)
        at php.java.bridge.Parser.read(Parser.java:86)
        at php.java.bridge.Parser.parse(Parser.java:163)
        at php.java.bridge.Request.handleRequest(Request.java:377)
        at php.java.bridge.Request.handleRequests(Request.java:485)
        at php.java.bridge.http.ContextRunner.run(ContextRunner.java:140)
        at php.java.bridge.ThreadPool$Delegate.run(ThreadPool.java:60)


the above thread dump is missing the trace from Java.inc. Are you sure that you use the PHP/Java
Bridge? -- Or do you still use the java.so developed for PHP4?

Can you please remove any "[java]" entry from your php.ini file(s) and try again?


Regards,
Jost Boekemeier








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Hi Jost,

>  [PHP crashes on some installations]
>
> >          //WHEN THE FOLLOWING LINE IS ACTIVATED, THE BRIDGE OR PHP CRASHES
>  >          //$batchQuery->addStationData( $stationData );
>
>  please check if those installations have the PHP 4 compatibility flag set (please see
>  http://sourceforge.net/tracker/index.php?func=detail&aid=1942948&group_id=117793&atid=679233) and
>  switch if off at run time, if necessary.

It is off, per php.ini:
zend.ze1_compatibility_mode = Off

>  Please check if those installations use a PHP version >= 5.1.4. All earlier PHP 5 versions have a
>  bug in the zend engine (in the object overloading code) which may cause random PHP crashes.

We're using PHP 5.2.5 with Bridge 5.2.0.

But we have found a weird hack/fix for the problem. If we do:

$batchQuery->addStationData( $stationData );

it crashes. But when we do:

$dummy = $batchQuery->addStationData( $stationData );
unset($dummy);

It does not crash. Strange!


Antonio

Hi Antonio,

[PHP crashes on some installations]
>          //WHEN THE FOLLOWING LINE IS ACTIVATED, THE BRIDGE OR PHP CRASHES
>          //$batchQuery->addStationData( $stationData );

please check if those installations have the PHP 4 compatibility flag set (please see
http://sourceforge.net/tracker/index.php?func=detail&aid=1942948&group_id=117793&atid=679233) and
switch if off at run time, if necessary.

Please check if those installations use a PHP version >= 5.1.4. All earlier PHP 5 versions have a
bug in the zend engine (in the object overloading code) which may cause random PHP crashes.


Regards,
Jost Boekemeier



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I am having a strange problem on certain boxes with the JavaBridge. It
works fine on others. The following is logged:
---------------------------
Apr 24 11:57:00 VMBridge ERROR: An exception occured:
java.net.SocketException: Connection reset
java.net.SocketException: Connection reset
        at java.net.SocketInputStream.read(Unknown Source)
        at php.java.bridge.Parser.read(Parser.java:86)
        at php.java.bridge.Parser.parse(Parser.java:163)
        at php.java.bridge.Request.handleRequest(Request.java:377)
        at php.java.bridge.Request.handleRequests(Request.java:485)
        at php.java.bridge.http.ContextRunner.run(ContextRunner.java:140)
        at php.java.bridge.ThreadPool$Delegate.run(ThreadPool.java:60)
Apr 24 11:57:00 VMBridge DEBUG: contextfactory: context destroyed
(remove context factory): ContextFactory: Context# 29@, credentials:
[no credentials], SimpleContextFactory: class
php.java.bridge.http.SimpleContextFactory, current loader:
sun.misc.Launcher$AppClassLoader@11b86e7
Apr 24 11:57:00 VMBridge DEBUG: contextfactory: removed context:
ContextFactory: Context# 29@, credentials: [no credentials],
SimpleContextFactory: class php.java.bridge.http.SimpleContextFactory,
current loader: sun.misc.Launcher$AppClassLoader@11b86e7, # of
contexts: 0
Apr 24 11:57:00 VMBridge DEBUG: contextfactory: servlet done waiting
for ContextFactory 13480046 for 30000 ms
Apr 24 11:57:00 VMBridge DEBUG: end (thread returned to pool):
Thread[VMBridgeHttpServerThreadPool#1,5,VMBridgeHttpServerThreadPool#1]
Apr 24 11:57:00 VMBridge DEBUG: end (thread returned to pool):
Thread[JavaBridgeContextRunner#1,5,JavaBridgeContextRunner#1]
---------------------------

The PHP code is pretty simple and straightforward. When the line
$batchQuery->addStationData( $stationData ); is activated, the bridge
(or PHP) crashes (and the http request from the Browser is killed, so
it might be PHP/Apache dying). On other machines (even with older
JavaBridge), it works fine.

<?php

        $class_path = null;
        $class_path .= 'jet-upload-shared.jar;';
        $class_path .= 'jet-log-loader-client.jar;';
        $class_path .= 'mediatel-utils.jar;';
        $class_path .= 'jbossall-client.jar;';
        $class_path .= 'jboss-aop-jdk50-client.jar;';
        $class_path .= 'jboss-aspect-jdk50-client.jar;';
        $class_path .= 'jboss-ejb3-client.jar;';
        $class_path .= 'jnp-client.jar;';
        $class_path .= 'deml-client.jar;';
        $class_path .= 'de-client.jar;';
        $class_path .= 'mtier-client.jar;';
        $class_path .= 'log4j.jar';
        require_once('Java.inc');
        java_require( $class_path );

	$batchList = new Java( "java.util.ArrayList" );

	$indexValue = 1;
	$station['rajar_wave'] = 141;
	$station['rajar_wavelength'] = 6;
	$station['audience_id'] = 1149;
	$station['rsl'] = 95;

         $batchQuery = new Java( "uk.mediatel.de.wrappers.BatchQuery",
                                 $indexValue,
                                 'impacts',
                                 (int)$station['rajar_wave'],
                                 (int)$station['rajar_wavelength'],
                                 (int)$station['audience_id']
                               );
         // Specify the RSL codes for the stations we are dealing with
         $stationData = new Java(
"uk.mediatel.de.wrappers.StationData", (int)$station['rsl'] );
         echo 'indexValue = ' . $indexValue.'<hr>';
         echo 'rajar_wavelength = '.(int)$station['rajar_wavelength'].'<hr>';
         echo 'rajar_wave = '.(int)$station['rajar_wave'].'<hr>';
         echo 'audience_id = '.(int)$station['audience_id'].'<hr>';
         echo 'rsl = '.$station['rsl'].'<hr>';

         //WHEN THE FOLLOWING LINE IS ACTIVATED, THE BRIDGE OR PHP CRASHES
         //$batchQuery->addStationData( $stationData );

         echo "ok";
         exit;

?>

Any suggestions are welcome!

Cheers,


Antonio

Hi,


> Apache+PHP ran 
> stable before for months and it crashes when i try a simple bridge 
> example. 

You must know what you do. If you include some experimental C extension into your PHP code
(sometimes called php_java.dll or java.so), the C extension might crash your PHP and HTTP server.


However, this has nothing to do with the PHP/Java Bridge, as the bridge is written in pure Java.
It requires a Java back end and uses PHP's fopen()/fread()/fwrite() to communicate with it. 

If PHP's fopen/fread/fwrite cause a segmentation fault, please report this bug to the PHP
developers, not to us.



> bridge is masked 
> unstable on gentoo since more people report segmentation faults with it.

There is no native PHP/Java Bridge port available for gentoo. The native (GCC compiled) bridge is
only available for RedHat/Fedora Linux. On all other operating systems you need a tomcat or J2EE
back end. Please see Andre's Debian/Ubuntu port for an example.


Regards,
Jost Boekemeier




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php...@li... schrieb:
> Since Java runs in a separate process, and PHP communicates with Java using plain
> fopen()/fwrite()/fread() calls, the Bridge cannot crash PHP or the Apache process, regardless of
> how badly it behaves.
> 
> 
> If Apache crashes, there's either a bug in PHP or Apache itself.

Well, thanks. This of course doesn't help me at all. Apache+PHP ran 
stable before for months and it crashes when i try a simple bridge 
example. And i'm not the only one having problems - the bridge is masked 
unstable on gentoo since more people report segmentation faults with it.

Even if it is not directly a bug in the bridge, maybe it's a side effect 
with some other component of PHP/Apache. Obviously something the bridge 
does, leads to an unstable condition that needs further investigation.

To be honest i feel quite left alone with my problem. So if that's all 
help i can get here unfortunately the bridge is not an option for me - 
and obviously many others.

Mike