TOMCAT and JNI problem...
Hello.
I'm running a JSP based Web aplicacion using Tomcat wich uses a Java Class
that loads a
native library (JNI).
The files are created as follows:
javac extractor/HTDInterface.java
javah extractor.HTDInterface
then I compile my c++ source code with the header file
extractor_HTDInterface.h to create
the shared library libhtd.so
create a jar file with the Class that implements JNI call
static {
System.loadLibrary(htd);
jar cvf extractor.jar extractor/HTDInterface.class
For testing a standalone application I set my CLASSPATH to include
extractor.jar
and libhtd.so file is placed inside the JDK at /JAVA_HOME/jre/lib/i386/
I successfully build and run The standalone application usin the shared
library.
For the web application, extractor.jar is placed at /common/lib/ TOMCAT
directory
I leave the libhtd.so at the /JAVA_HOME/jre/lib/i386/ JDK directory.
When my JSP based Web application calls the native library method
the Tomcat just STOPS it doesn't work STOPS
The message is:
The connection was refused when attempting to contact localhost:8080
I have to run startup.sh script again.
I took off the libhtd.so file from /JAVA_HOME/jre/lib/i386/ and I placed it
in a different directory outside the tomcat:
/home/myuser/lib/libhtd.so
Then I made a script to start the tomcat with the LD_LIBRARY_PATH
environment variable set up:
-
#!/bin/sh
export JAVA_HOME=/opt/java
export CATALINA_HOME=/usr/local/jakarta-tomcat
export PATH=${JAVA_HOME}/bin:${PATH}
export JAVA_PATH=${JAVA_HOME}
# path to load the libhtd.so shared library
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/home/myuser/lib
cd /usr/local/jakarta-tomcat/bin
sh startup.sh
-
BUT the same happens when the Web application calls the native library
method
the Tomcat just STOPS it doesn't work ..STOPS
The message is:
The connection was refused when attempting to contact localhost:8080
just like when you try to load the web application and the TOMCAT server is
not UP.
Does anyone knows how to solve this
I have read that maybe setting up the CATALINA_OPTS environment variable
can solve this
problem BUT I dont know how to set that variable. ???
I hope this time I've made myself clear
Another thing: I'm working under Red Hat 9.0 TOMCAT 4.1.27 and JDK 1.4.2
Pablo Vidal
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Re: TOMCAT and JNI problem...
Then I made a script to start the tomcat with the LD_LIBRARY_PATH
environment variable set up:
-
#!/bin/sh
export JAVA_HOME=/opt/java
export CATALINA_HOME=/usr/local/jakarta-tomcat
export PATH=${JAVA_HOME}/bin:${PATH}
export JAVA_PATH=${JAVA_HOME}
# path to load the libhtd.so shared library
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/home/myuser/lib
cd /usr/local/jakarta-tomcat/bin
sh startup.sh
-
Did you try to startup Tomcat with the same script, without using your library, in
order to check if the script works right?
Sometimes I had such error when I forgot to set JAVA_HOME or CATALINA_HOME properly
:-)))
G
--
Giuseppe Briotti
[EMAIL PROTECTED]
Alme Sol, curru nitido diem qui
promis et celas aliusque et idem
nasceris, possis nihil urbe Roma
visere maius.
(Orazio)
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Re: TOMCAT and JNI problem...
Did you try to startup Tomcat with the same script, without using your
library, in order to check if the script works right?
YES I start up the tomcat with the same script to test other
applications that doesn't work with JNI and everything goes fine.
Pablo Vidal
From: Giuseppe Briotti [EMAIL PROTECTED]
Reply-To: Tomcat Users List [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Re: TOMCAT and JNI problem... Date: Mon, 26 Jan 2004 17:29:02
+0100 (CET)
Then I made a script to start the tomcat with the LD_LIBRARY_PATH
environment variable set up:
-
#!/bin/sh
export JAVA_HOME=/opt/java
export CATALINA_HOME=/usr/local/jakarta-tomcat
export PATH=${JAVA_HOME}/bin:${PATH}
export JAVA_PATH=${JAVA_HOME}
# path to load the libhtd.so shared library
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/home/myuser/lib
cd /usr/local/jakarta-tomcat/bin
sh startup.sh
-
Did you try to startup Tomcat with the same script, without using your
library, in order to check if the script works right?
Sometimes I had such error when I forgot to set JAVA_HOME or CATALINA_HOME
properly :-)))
G
--
Giuseppe Briotti
[EMAIL PROTECTED]
Alme Sol, curru nitido diem qui
promis et celas aliusque et idem
nasceris, possis nihil urbe Roma
visere maius.
(Orazio)
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RE: TOMCAT and JNI problem...
Hi Pablo
we also use JNI in our web apps. it works (except the reloading issue, but
that's another story).
we use the ./bin/setenv.sh script for our settings, therefore:
...
# must contain the ACE Agent JNI library libaceagent.so:
LD_LIBRARY_PATH=/home/bgo/deploy/sr-hls/native
export LD_LIBRARY_PATH
...
I assume, your JNI implementation is somehow broken... and this makes Tomcat
stop... but that's just a wild guess from far away...
regards
-Bernd.
-Original Message-
From: J.Pablo M [mailto:[EMAIL PROTECTED]
Sent: Montag, 26. Januar 2004 17:20
To: [EMAIL PROTECTED]
Subject: TOMCAT and JNI problem...
Hello.
I'm running a JSP based Web aplicacion using Tomcat wich
uses a Java Class
that loads a
native library (JNI).
The files are created as follows:
javac extractor/HTDInterface.java
javah extractor.HTDInterface
then I compile my c++ source code with the header file
extractor_HTDInterface.h to create
the shared library libhtd.so
create a jar file with the Class that implements JNI call
static {
System.loadLibrary(htd);
jar cvf extractor.jar extractor/HTDInterface.class
For testing a standalone application I set my CLASSPATH to include
extractor.jar
and libhtd.so file is placed inside the JDK at
/JAVA_HOME/jre/lib/i386/
I successfully build and run The standalone application usin
the shared
library.
For the web application, extractor.jar is placed at
/common/lib/ TOMCAT
directory
I leave the libhtd.so at the /JAVA_HOME/jre/lib/i386/ JDK directory.
When my JSP based Web application calls the native library method
the Tomcat just STOPS it doesn't work STOPS
The message is:
The connection was refused when attempting to contact
localhost:8080
I have to run startup.sh script again.
I took off the libhtd.so file from /JAVA_HOME/jre/lib/i386/
and I placed it
in a different directory outside the tomcat:
/home/myuser/lib/libhtd.so
Then I made a script to start the tomcat with the LD_LIBRARY_PATH
environment variable set up:
-
#!/bin/sh
export JAVA_HOME=/opt/java
export CATALINA_HOME=/usr/local/jakarta-tomcat
export PATH=${JAVA_HOME}/bin:${PATH}
export JAVA_PATH=${JAVA_HOME}
# path to load the libhtd.so shared library
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/home/myuser/lib
cd /usr/local/jakarta-tomcat/bin
sh startup.sh
-
BUT the same happens when the Web application calls the native library
method
the Tomcat just STOPS it doesn't work ..STOPS
The message is:
The connection was refused when attempting to contact
localhost:8080
just like when you try to load the web application and the
TOMCAT server is
not UP.
Does anyone knows how to solve this
I have read that maybe setting up the CATALINA_OPTS
environment variable
can solve this
problem BUT I dont know how to set that variable. ???
I hope this time I've made myself clear
Another thing: I'm working under Red Hat 9.0 TOMCAT 4.1.27
and JDK 1.4.2
Pablo Vidal
_
MSN Amor: busca tu ½ naranja http://latam.msn.com/amor/
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
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To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
