[Php-java-bridge-users] FIXED - Re: NPE in GlobalRef.get

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I added some debug output to begin_header in client.c:

  case 'X':// Redirect
    {
php_log_err("Got X");
php_log_err(str);
      char *key;
      static const char context[] = "X_JAVABRIDGE_CONTEXT";
      static const char redirect[]= "X_JAVABRIDGE_REDIRECT";
      if(!(*ctx)->peer_redirected && !strcmp(str, redirect)) {
php_log_err("redirect");

And this is what I get:

[Sat Jun 10 21:50:47 2006] [error] [client 127.0.0.1] Got X, referer: 
http://localhost:81/JavaBridge/index.php
[Sat Jun 10 21:50:47 2006] [error] [client 127.0.0.1] 
X_javabridge_redirect, referer: http://localhost:81/JavaBridge/index.php

But no 'redirect'; the header has been munged to Mixed case, so the 
strcmp against redirect fails. I suspect this is happening in the Web 
Server implementation of HttpServletResponse.

HTTP spec (http://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2) 
states that header field names are case-insensitive, so the comparison 
should use strcasecmp. Changing strcmp to strcasecmp in lines 398, 414, 
424 and 444 fixes the problem.

Hope this is useful, and thanks again for a really useful tool :-)

Cheers,

Pat

php...@li... wrote:
> I successfully built php-java-bridge_3.0.8.3 on Solaris 10 U1 x86. I'm 
> now trying to deploy it. I have Apache 2.2 + PHP5 on the 'client' end, 
> Sun Java System Web Server 6.1 SP5 on the server end.
>
> In my php.ini, I have:
>
> extension = java.so
> [java]
> java.hosts = "127.0.0.1:80"
> java.servlet = "/JavaBridge/JavaBridge.phpjavabridge"
> java.log_level="4"
>
>
> After some tweaks to fix some SJSWS specific issues (ensuring that all 
> directories in the pat to the shared docs directory are 755, changing 
> the ACL to allow PUT), I'm stuck. test.php hangs before it shows the 
> bottom of the page.
>
> The WS error log shows an NPE in GlobalRef.get. Here is the whole 
> interaction as logged at WS:
>
> [09/Jun/2006:23:10:33] info (21795): for host 127.0.0.1 trying to PUT 
> /JavaBridge/JavaBridge.phpjavabridge, service-j2ee reports: WEB2798: 
> [/JavaBridge] ServletContext.log():  JavaBridge DEBUG: @1a73d30 --> <C 
> v="java.lang.System" p="C" i="136880520" >
> [09/Jun/2006:23:10:33] info (21795): for host 127.0.0.1 trying to PUT 
> /JavaBridge/JavaBridge.phpjavabridge, service-j2ee reports: WEB2798: 
> [/JavaBridge] ServletContext.log():  JavaBridge DEBUG: @1a73d30 --> </C>
> [09/Jun/2006:23:10:33] info (21795): for host 127.0.0.1 trying to PUT 
> /JavaBridge/JavaBridge.phpjavabridge, service-j2ee reports: WEB2798: 
> [/JavaBridge] ServletContext.log():  JavaBridge DEBUG: @1a73d30  <-- <O 
> v="1" p="O" i="136880520"/>
> [09/Jun/2006:23:10:33] info (21795): for host 127.0.0.1 trying to PUT 
> /JavaBridge/JavaBridge.phpjavabridge, service-j2ee reports: WEB2798: 
> [/JavaBridge] ServletContext.log():  JavaBridge DEBUG: @1a73d30 
> re-directing to port# Pipe:/var/tmp//.php_java_bridgeC3a4CQ
> [09/Jun/2006:23:10:33] info (21795): for host 127.0.0.1 trying to PUT 
> /JavaBridge/JavaBridge.phpjavabridge, service-j2ee reports: WEB2798: 
> [/JavaBridge] ServletContext.log():  JavaBridge DEBUG: @1a73d30 --> <I 
> v="1" m="getProperties" p="I" i="136886208" >
> [09/Jun/2006:23:10:33] info (21795): for host 127.0.0.1 trying to PUT 
> /JavaBridge/JavaBridge.phpjavabridge, service-j2ee reports: WEB2798: 
> [/JavaBridge] ServletContext.log():  JavaBridge ERROR: An exception occured
> [09/Jun/2006:23:10:33] failure (21795): for host 127.0.0.1 trying to PUT 
> /JavaBridge/JavaBridge.phpjavabridge, service-j2ee reports: WEB2798: 
> [/JavaBridge] ServletContext.log():
> java.lang.NullPointerException
>     at php.java.bridge.GlobalRef.get(GlobalRef.java:30)
>     at php.java.bridge.Request.getGlobalRef(Request.java:88)
>     at php.java.bridge.Request.begin(Request.java:352)
>     at php.java.bridge.Parser.CALL_BEGIN(Parser.java:95)
>     at php.java.bridge.Parser.parse(Parser.java:156)
>     at php.java.bridge.Request.handleRequest(Request.java:460)
>     at php.java.bridge.Request.handleRequests(Request.java:493)
>     at 
> php.java.servlet.PhpJavaServlet.handleSocketConnection(PhpJavaServlet.java:213)
>     at php.java.servlet.PhpJavaServlet.doPut(PhpJavaServlet.java:260)
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
>     at javax.servlet.http.HttpServlet.service(HttpServlet.java:908)
>     at 
> org.apache.catalina.core.StandardWrapperValve.invokeServletService(StandardWrapperValve.java:771)
>     at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:322)
>     at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)
>     at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:212)
>     at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)
>     at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:209)
>     at 
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:509)
>     at 
> com.iplanet.ias.web.connector.nsapi.NSAPIProcessor.process(NSAPIProcessor.java:161)
>     at com.iplanet.ias.web.WebContainer.service(WebContainer.java:580)
>
> 30 seconds later, Apache reports:
>
> [Fri Jun 09 23:11:03 2006] [notice] child pid 21735 exit signal 
> Segmentation fault (11)
>
> Any idea what could be happening here?
>
> I'm trying to interpret the trace from the WS error file - extracting 
> the relevant stuff, it says:
>
> # $v = new JavaClass("java.lang.System");
> <C v="java.lang.System" p="C" i="136880520" >
> </C>
> <O v="1" p="O" i="136880520"/>
>
> re-directing to port# Pipe:/var/tmp//.php_java_bridgeC3a4CQ
>
> # $v->getProperties()
> <I v="1" m="getProperties" p="I" i="136886208" >
>
> So the first method invocation returns an object reference '1', which is 
> then used in the second invocation, but, by then, this object doesn't 
> seem to exist. I can see the redirection to the named pipe in between 
> the two calls, but, from the stack trace, the client doesn't seem to be 
> following the redirect - it's just doing another PUT.
>
> It looks like the client should be setting the 
> X_JAVABRIDGE_OVERRIDE_HOSTS header to override the redirect, but, for 
> some reason, it doesn't, so the server doesn't know to preserve the 
> context in the second PUT.
>
> Does this all make sense? Any suggestions on tracking this down further?
>
> Cheers,
>
> Pat
>   
-- 
------------------------------------------------------------------------
Pat Patterson <mailto:pat...@su...>
Federation Architect
Superpatterns <http://blogs.sun.com/roller/page/superpat> blog, Planet 
Identity <http://planetidentity.org>
Identity Management Products <http://www.sun.com/identity>
/Sun Microsystems, Inc. <http://www.sun.com/>/
------------------------------------------------------------------------