php-java-bridge-users Mailing List for PHP/Java Bridge (Page 65)

Hi,

> protocol error: , Invalid document end at col 16. Check the
> back end log for OutOfMemoryErrors...

this error message means that your .NET or Java VM has problems.
Please see our FAQ "What does a "protocol error ..." mean?" for details.


Regards,
Jost Boekemeier



      

Hi All,

 

I have the following setup

I have Apache 2.2 and php 5.2 as part of WAMP installation.

I have tomcat running on another server. I have JavaBridge installed within
my application in Tomcat.

 

When I try to run my php page that calls the Java Bridge and I get the
following error

 

protocol error: , Invalid document end at col 16. Check the back end log for
OutOfMemoryErrors...

 

I have no idea why this could be happening.

 

Any help on this is highly appreciated.

 

Thanks

-Ajit

It means that the method Hits.doc expects an int as argument but was
given a string. You should explicitly convert the value in PHP using
intval for example.

If you plan to use PHP/Java Bridge heavily, I recommend you learn to
decode such exception reports because they will provide the only clue
as to what's wrong with your code!

On Tue, Dec 16, 2008 at 1:34 PM,
<php...@li...> wrote:
> I am getting the following error when trying to use lucene search not quite sure what it means...
>
> Fatal error: Uncaught [[o:Exception]:"java.lang.Exception: Invoke failed: [[o:Hits]]->doc((o:int)[o:String]). Cause: java.lang.IllegalArgumentException VM: 1.4.2@http://gcc.gnu.org/java/" at: #-6 java.lang.reflect.Method.invoke(libgcj.so.7rh) #-5 php.java.bridge.JavaBridge.Invoke(JavaBridge.java:1079) #-4 php.java.bridge.Request.handleRequest(Request.java:405) #0 http://localhost:8080/JavaBridge/java/Java.inc(328): java_ThrowExceptionProxyFactory->getProxy(11, 'java.lang.Strin...', 'java.lang.Illeg...', true) #1 http://localhost:8080/JavaBridge/java/Java.inc(485): java_Arg->getResult(true) #2 http://localhost:8080/JavaBridge/java/Java.inc(491): java_Client->getWrappedResult(true) #3 http://localhost:8080/JavaBridge/java/Java.inc(695): java_Client->getResult() #4 http://localhost:8080/JavaBridge/java/Java.inc(1837): java_Client->invokeMethod(5, 'doc', Array) #5 http://localhost:8080/JavaBridge/java/Java.inc(1955): java_JavaProxy->__call('doc', Array) #6 http://localhost:8080/JavaBridge/java/Java.inc(2131): java_AbstractJav in http://localhost:8080/JavaBridge/java/Java.inc on line 291
>
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I am getting the following error when trying to use lucene search not quite sure what it means... 

Fatal error: Uncaught [[o:Exception]:"java.lang.Exception: Invoke failed: [[o:Hits]]->doc((o:int)[o:String]). Cause: java.lang.IllegalArgumentException VM: 1.4.2@http://gcc.gnu.org/java/" at: #-6 java.lang.reflect.Method.invoke(libgcj.so.7rh) #-5 php.java.bridge.JavaBridge.Invoke(JavaBridge.java:1079) #-4 php.java.bridge.Request.handleRequest(Request.java:405) #0 http://localhost:8080/JavaBridge/java/Java.inc(328): java_ThrowExceptionProxyFactory->getProxy(11, 'java.lang.Strin...', 'java.lang.Illeg...', true) #1 http://localhost:8080/JavaBridge/java/Java.inc(485): java_Arg->getResult(true) #2 http://localhost:8080/JavaBridge/java/Java.inc(491): java_Client->getWrappedResult(true) #3 http://localhost:8080/JavaBridge/java/Java.inc(695): java_Client->getResult() #4 http://localhost:8080/JavaBridge/java/Java.inc(1837): java_Client->invokeMethod(5, 'doc', Array) #5 http://localhost:8080/JavaBridge/java/Java.inc(1955): java_JavaProxy->__call('doc', Array) #6 http://localhost:8080/JavaBridge/java/Java.inc(2131): java_AbstractJav in http://localhost:8080/JavaBridge/java/Java.inc on line 291 

> usual mod_jk type
> of connection between the two. (?)

Please see our FAQ "I want to use Apache/IIS as a front-end and tomcat as a back end. How do I enable PHP and JSP for all my applications?"

> The purpose of this project is to incorporate the
> functionality of the java
> servlets into an existing php site.   I intend to pass php
> variable values
> to servlets on the tomcat box to retrieve information from
> the backend
> database and present it using php generated html on the
> apache box.

For this you don't need JSP. Just copy the JavaBridge.war to your J2EE back end, wait until the JavaBridge directory appears and copy the JavaBridge folder to the HTTP server. Please see our install instructions for details.


Regards,
Jost Boekemeier

P.S.: I am open for suggestions how to improve our documentation so that such questions won't be asked regularly.
     


      

Hi everybody,
 
I have a problem with my PHP-Java application. Actually, it is not about PHP/Java Bridge, but somehow I feel that this community will better understand the nature of my problem than if I ask on some PHP forum, because I use JavaBridge and PHP from Tomcat server. 

I have deployed my PHP application on the Tomcat server. It uses PHP that is configured in myApp/WEB-INF/cgi/php.ini. It uses JavaBridge from the same Tomcat server to access java application that performs a time consuming operation, that affects PHP page exceed time limit after some 35 seconds. However, I have set both php.ini (in myApp and in JavaBridge) like:
 
max_execution_time = 350   ; Maximum execution time of each script, in seconds
max_input_time = 60 ; Maximum amount of time each script may spend parsing request data
;max_input_nesting_level = 64 ; Maximum input variable nesting level
memory_limit = 128M      ; Maximum amount of memory a script may consume (128MB)
 
 
test.php started from myApp shows that php.ini from myApp is used. This application has been worked before I have reinstalled my system, but I didn't keep my configurations files, so I'm in problem now. Could you help me, please, with some advice. Did I missed something to set here?
 
Thanks,

Zoran


      

 

I am hoping that the php/java bridge will allow me to do what I think it
will and would like confirmation from active users..  Thanks in advance.

 

 

I will have a box at one location that will be running apache2/php5.

I have another box at a remote location running tomcat with servlets that I
need to access in order to query a back end database.

I will be running a VPN pipe between the two for security purposes.

 

My understanding so far is that I do not to need to use a usual mod_jk type
of connection between the two. (?)

 

The purpose of this project is to incorporate the functionality of the java
servlets into an existing php site.   I intend to pass php variable values
to servlets on the tomcat box to retrieve information from the backend
database and present it using php generated html on the apache box.

 

Am I on the right track?

 

 

 

 

Thanks for your explanation. The Java class loader is a tricky beast.

On Sun, Dec 14, 2008 at 11:32 AM,
<php...@li...> wrote:
> Hi,
>
>> 1. required jar files for Java classes A and B were
>> included in java_require
>> 2. PHP script was able to instantiate class B
>> 3. class A was not able to instantiate that same class B?
>
> Class B came from another class loader which has no relationship to the loader for (A,B), most likely the bootstrap loader. Which means that you have violated the module contract.
>
>
>> 4. this behaviour occurred because of supplying relative
>> paths to java_require
>
> Whether or not a library has an absolute or relative path is irrelevant.
>
>
>> Furthermore, doesn't that observation indicate an
>> inconsistency in class loading mechanism?
>
> Yes, definitely. This part of the Java platform is broken by design.
>
> Compare it with .NET or with SML/NJ. -- There was a proposal for a real module system based on generics, but this needs real generics within the JVM, something that Java doesn't support either (current Java 1.5 generics are syntactic shugar, for the compiler and for marketing).
>
> However, this doesn't have anything to do with the PHP/Java Bridge.
>
>
> Regards,
> Jost Boekemeier
>
>
>
>
>
>
> ------------------------------------------------------------------------------
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> https://lists.sourceforge.net/lists/listinfo/php-java-bridge-users
>

Hi,

> 1. required jar files for Java classes A and B were
> included in java_require
> 2. PHP script was able to instantiate class B
> 3. class A was not able to instantiate that same class B?

Class B came from another class loader which has no relationship to the loader for (A,B), most likely the bootstrap loader. Which means that you have violated the module contract.


> 4. this behaviour occurred because of supplying relative
> paths to java_require

Whether or not a library has an absolute or relative path is irrelevant.


> Furthermore, doesn't that observation indicate an
> inconsistency in class loading mechanism?

Yes, definitely. This part of the Java platform is broken by design. 

Compare it with .NET or with SML/NJ. -- There was a proposal for a real module system based on generics, but this needs real generics within the JVM, something that Java doesn't support either (current Java 1.5 generics are syntactic shugar, for the compiler and for marketing).

However, this doesn't have anything to do with the PHP/Java Bridge.


Regards,
Jost Boekemeier




      

Hi,

How does the statement "all classes and their dependencies must be
loaded by one, and only one, class loader", relate to the observation
that:

1. required jar files for Java classes A and B were included in java_require
2. PHP script was able to instantiate class B
3. class A was not able to instantiate that same class B?
4. this behaviour occurred because of supplying relative paths to java_require

Furthermore, doesn't that observation indicate an inconsistency in
class loading mechanism?

Apologies for my lack of understanding,
Karim

Hi,

> instantiate a class B located in another jar, it ran the
> risk of not finding the appropriate (class),[...] even though, 
> PHP was able to instantiate B)

I think this is pretty obvious, as it follows from the FAQ statement "all classes and their dependencies must be loaded by one, and ony one, class loader"

If you have any suggestions how we could improve our documentation, please let us know.


> fix the bridge such that the VM's class loader behaves java_require.

You seem to think that this is a PHP/Java Bridge issue, but it isn't. Kay's dynamic class loader simply passes on what Java has to offer.


Regards,
Jost Boekemeier



      

I saw similar behaviour when I first set up the Java-Bridge.  If Module A 
called a function in Module B.  And the function in Module B needed a jar 
for a call in Module B.  I assumed that I could include the jar in Module 
B only.  But I found that I needed to include it in Module A as well. Once 
I saw it, it was not a big problem, but determining what was happening was 
frustrating.  Now I just put everything in the ext directory and it is 
simpler.  Everything loads statically on startup.

Charles Shaffer
Senior Analyst
NTN-Bower Corporation




php...@li...
12/12/2008 04:10 PM
Please respond to php-java-bridge-users

 
        To:     php...@li...
        cc: 
        Subject:        Re: [Php-java-bridge-users] How to debug NoClassDefFoundError exceptions?


Thanks for your reply.

After re-reading the FAQ thoroughly, I made several experiments to see
the bridge's reaction to placing the jars in different places. What I
found is this:

I had given a *relative* path for each jar to java_autoload. It loaded
them successfully, and I was able to *explicitly* instantiate classes
from all those autoloaded jars. However, if a Java class A tried to
instantiate a class B located in another jar, it ran the risk of not
finding the appropriate jar (even though, again, PHP was able to
instantiate B). What I mean by "risk" is that loading only sometimes
failed. When I specified the *absolute* paths for the jars, the
problem went away.

I would humbly suggest to document this behaviour in the FAQ, or to
fix the bridge such that the VM's class loader behaves just like
java_require.

Thanks,
K.

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Thanks for your reply.

After re-reading the FAQ thoroughly, I made several experiments to see
the bridge's reaction to placing the jars in different places. What I
found is this:

I had given a *relative* path for each jar to java_autoload. It loaded
them successfully, and I was able to *explicitly* instantiate classes
from all those autoloaded jars. However, if a Java class A tried to
instantiate a class B located in another jar, it ran the risk of not
finding the appropriate jar (even though, again, PHP was able to
instantiate B). What I mean by "risk" is that loading only sometimes
failed. When I specified the *absolute* paths for the jars, the
problem went away.

I would humbly suggest to document this behaviour in the FAQ, or to
fix the bridge such that the VM's class loader behaves just like
java_require.

Thanks,
K.

Hi,

> Please, where can I find (URL) the PHP-Java-Bridge
> "pure Java download" for Solaris ?

there is no "download for XXX". The bridge is pure Java, so there's only one download for all operating systems. The Java source is contained in the download file. 

Please visit php-java-bridge.sf.net and click on the download link.


We make Linux RPM and DEB packages available for convenience. You may use the package Linux sources if your operating system supports deb or rpm packages, Security Enhanced Linux and the GNU toolchain.


Regards,
Jost Boekemeier



      

Hi,

> happens only when I run the page in Tomcat using the

please check your PHP version then and check this with the PHP developers.

I am sorry, but we cannot help you with PHP related problems.


Regards,
Jost Boekemeier



      

Hi,

please see our FAQ "Why do I get a NoClassDefFoundError?"



> the code doesn't complain. Also, a pure Java
> application that
> instantiates XSSFWorkbook and manipulates it works fine.

Whether or not calls are routed through a TCP socket and the java reflection machinery doesn't make a difference; so if your application works standalone, it will work as well when the same sequence is called via the bridge protocol from a remote PHP/Scheme/Python application.


Regards,
Jost Boekemeier



      

Hello Jost B.,

thank you for your answer,
Please, where can I find (URL) the PHP-Java-Bridge "pure Java download" for Solaris ?
I'm running Apache 2.x and PHP-Java-Bridge 4.0.8a on my Solaris, and want to upgrade to
PHP-Java-Bridge 5.3.x.

B.



--- On Thu, 12/11/08, php...@li... <php...@li...> wrote:
From: php...@li... <php...@li...>
Subject: Re: [Php-java-bridge-users] php-java-bridge-5.3.4: compile error
To: php...@li...
Date: Thursday, December 11, 2008, 12:40 PM

Hi,

> `/opt/coolstack/

The RedHat/Fedora source is for RedHat/Fedora Linux; the Debian download is for
debian and ubuntu linux.

For Solaris please use the pure Java download instead.





      

Dear Jost, the same page works fine in apache, the preg_replace issue
happens only when I run the page in Tomcat using the php-bridge, this let me
thinks it is not a php issue.
Any clue?
Thanks,
E.



Hi,

> preg_replace
>
> when I try to call this function is not available.


Please ask the PHP developers. This is a PHP issue, not a PHP/Java Bridge
issue.


Regards,
Jost Boekemeier

Hello,

I've got this error I'd like some help with. I'm using Apache POI 3.5
to read XLS and XLSX files, but trying to do:

$workbook = new org_apache_poi_xssf_usermodel_XSSFWorkbook();

fails with:

java.lang.Exception: CreateInstance failed: new
org.apache.poi.xssf.usermodel.XSSFWorkbook. Cause:
java.lang.ClassNotFoundException: Unresolved external reference:
java.lang.NoClassDefFoundError: Could not initialize class
org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook. --
Unable to call constructor, see the README section "Java platform
issues" for details.

However, in the same page, when I call:

$wb = new org_openxmlformats_schemas_spreadsheetml_x2006_main_CTWorkbook();

the code doesn't complain. Also, a pure Java application that
instantiates XSSFWorkbook and manipulates it works fine.

So my question is: how to debug such problems? Where to start? I
downloaded DependencyFinder (http://depfind.sourceforge.net/) to see
if the referenced jars use other packages that are not present, but I
didn't find any.

TIA,
Karim

Hi,

> What was java.so removed??  

You mean why it has been removed? It has generated too many support requests. 


> extremely easy to get this installed and running.

If you don't install the SEL policy and tag the required files, the java.so will stop Apache from starting at all. This has been documented in the INSTALL document and in the README. 

Since version 5.4 we now use the generic J2EE backend on RedHat/Fedora Linux, too. It is less secure but it will be easier to maintain.


Regards,
Jost Boekemeier
 


      

Yeah I eventually figured this out and now have it running....

What was java.so removed??  The deb package made it extremely easy to get this installed and running.


----- Original Message -----
From: php...@li...
To: php...@li...
Sent: Thursday, December 11, 2008 3:44:06 PM GMT -05:00 US/Canada Eastern
Subject: Re: [Php-java-bridge-users] JavaBridge Running Now What


Hi,

> But enableing java.so in php.ini the server comes up and
> serves php pages until i put phpinfo() on a page and then it
> tries to serve back a blank page that it forces me to either
> open or save. 

Please remove the java.so.


Regards,
Jost Boekemeier


      

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Hi,

> Are the older versions of PHP/Java Bridge available ?

yes, all versions since version 1.0.8 are available for download from sf.net 5.3.3 is here: http://sourceforge.net/project/downloading.php?group_id=117793&use_mirror=surfnet&filename=php-java-bridge_5.3.3.tar.gz&45838214


Regards,
Jost Boekemeier



      

Hi,

> But enableing java.so in php.ini the server comes up and
> serves php pages until i put phpinfo() on a page and then it
> tries to serve back a blank page that it forces me to either
> open or save. 

Please remove the java.so.


Regards,
Jost Boekemeier


      

Hi,

> `/opt/coolstack/

The RedHat/Fedora source is for RedHat/Fedora Linux; the Debian download is for debian and ubuntu linux.

For Solaris please use the pure Java download instead.


Regards,
Jost Boekemeier



      

Hi,

> preg_replace
> 
> when I try to call this function is not available.


Please ask the PHP developers. This is a PHP issue, not a PHP/Java Bridge issue.


Regards,
Jost Boekemeier