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Sarge516

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jsvc.exec error: Cannot found Daemon Loader "version" entry point

OS Centos 6
commons-daemon-1.0.7.jar

I'm trying to use jsvc for the first time to help auto run a java program.  My program has the required methods (start(), etc. listed in the jsvc home web page.
I run as -debug and get the error listed in the title.

This is not related to running Tomcat, although I do have tomcat 6 installed and running. My classpath is auto created based on what jars are in my dir so I have not forced any jar ordering yet.


My Script is something like this :

JAVA_HOME=/usr/lib/jvm/jre-1.6.0-openjdk.x86_64
export JAVA_HOME
appdir=/opt/YOYO

myJars=`find $appdir *.jar`
for i in $myJars; do
    echo $i
    clp=$clp:$i
done

echo $clp

/usr/bin/jsvc  -cp $clp -version -debug  org.yoyol.v01_02.Server.Run.RunMe

So my question is what is needed to fix the missing "version" entry point ?

Thanks,
Sarge
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CEHJ
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>>myJars=`find $appdir *.jar`

looks suspect. Try the following and if that doesn't work, pass the -debug argument to jsvc
myJars=`find $appdir -type f -name '*.jar'`

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Avatar of Sarge516
Sarge516

ASKER

That certainly cleans up the classpath which is good. However, I still get the same error.

To confirm the classpath is correct, I can replacing the jsvs line with the one below and it  works - but interactively ..

java -cp $clp -jar MyApp.jar
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CEHJ
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Try putting in -debug and see what happens
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CEHJ
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The daemon classes themselves have to be in the classpath too afaik
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Sarge516

ASKER

Here is the result of the debug. The commons-daemon is in the classpath. The Daemon load shows found.

05/11/2011 14:07:00 6358 jsvc.exec debug: +-- DUMPING JAVA VM CREATION ARGUMENTS -----------------
05/11/2011 14:07:00 6358 jsvc.exec debug: | Version:                       10004
05/11/2011 14:07:00 6358 jsvc.exec debug: | Ignore Unrecognized Arguments: False
05/11/2011 14:07:00 6358 jsvc.exec debug: | Extra options:                 2
05/11/2011 14:07:00 6358 jsvc.exec debug: |   "-Djava.class.path=:/opt/YOYO/commons-lang-2.1.jar:/opt/YOYO/mysql-connector-java-5.1.6-bin.jar:/opt/YOYO/YOYOServer.jar:/opt/YOYO/mail.jar:/opt/YOYO/YOYO_Interfaces.jar:/opt/YOYO/commons-daemon-1.0.7.jar:-0.91.jar:/opt/YOYO/log4j-1.2.14.jar
05/11/2011 14:07:00 6358 jsvc.exec debug: +-------------------------------------------------------
05/11/2011 14:07:00 6358 jsvc.exec debug: Java VM created successfully
05/11/2011 14:07:00 6358 jsvc.exec debug: Class org/apache/commons/daemon/support/DaemonLoader found
05/11/2011 14:07:00 6358 jsvc.exec debug: Native methods registered
05/11/2011 14:07:00 6358 jsvc.exec error: Cannot found Daemon Loader "version" entry point
05/11/2011 14:07:00 6357 jsvc.exec error: Service exit with a return value of 255
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Sarge516

ASKER

Also, MyApp.jar is in the classpath. I'm trying to simply what I'm posting.
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CEHJ
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Your classpath is somewhat mangled. Look at the last entry


/opt/YOYO/commons-lang-2.1.jar
/opt/YOYO/mysql-connector-java-5.1.6-bin.jar
/opt/YOYO/YOYOServer.jar
/opt/YOYO/mail.jar
/opt/YOYO/YOYO_Interfaces.jar
/opt/YOYO/commons-daemon-1.0.7.jar
-0.91.jar

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CEHJ
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I missed the last actual entry out accidentally but at least it draws attention to a problem
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CEHJ
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In fact you can simplify that with the following (the quotes are essential)
/usr/bin/jsvc  -cp '/opt/YOYO/*.jar' -version -debug  org.yoyol.v01_02.Server.Run.RunMe

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Avatar of Sarge516
Sarge516

ASKER

Team,

      I appreciate the help but the mangled classpath was a cut/paste problem that I did. The classpath seems to be OK.  I've been trying many things now but still get the issue. Here is the last of the debug log.

06/11/2011 14:40:15 10625 jsvc.exec debug: +-- DUMPING JAVA HOME STRUCTURE ------------------------
06/11/2011 14:40:15 10625 jsvc.exec debug: | Java Home:       "/usr/lib/jvm/jre-1.6.0-openjdk.x86_64"
06/11/2011 14:40:15 10625 jsvc.exec debug: | Java VM Config.: "/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64/jvm.cfg"
06/11/2011 14:40:15 10625 jsvc.exec debug: | Found JVMs:      1
06/11/2011 14:40:15 10625 jsvc.exec debug: | JVM Name:        "server"
06/11/2011 14:40:15 10625 jsvc.exec debug: |                  "/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64/server/libjvm.so"
06/11/2011 14:40:15 10625 jsvc.exec debug: +-------------------------------------------------------
06/11/2011 14:40:15 10625 jsvc.exec debug: Running w/ LD_LIBRARY_PATH=/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64/server:/usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64
06/11/2011 14:40:15 10625 jsvc.exec debug: redirecting stdout to /dev/null and stderr to /dev/null
06/11/2011 14:40:15 10626 jsvc.exec debug: Using default JVM in /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64/server/libjvm.so
06/11/2011 14:40:15 10626 jsvc.exec debug: Attemtping to load library /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64/server/libjvm.so
06/11/2011 14:40:15 10626 jsvc.exec debug: JVM library /usr/lib/jvm/jre-1.6.0-openjdk.x86_64/lib/amd64/server/libjvm.so loaded
06/11/2011 14:40:15 10626 jsvc.exec debug: JVM library entry point found (0x244E3C90)
06/11/2011 14:40:15 10626 jsvc.exec debug: +-- DUMPING JAVA VM CREATION ARGUMENTS -----------------
06/11/2011 14:40:15 10626 jsvc.exec debug: | Version:                       10004
06/11/2011 14:40:15 10626 jsvc.exec debug: | Ignore Unrecognized Arguments: False
06/11/2011 14:40:15 10626 jsvc.exec debug: | Extra options:                 2
06/11/2011 14:40:15 10626 jsvc.exec debug: |   "-Djava.class.path=:/opt/YOYO/commons-lang-2.1.jar:/opt/YOYO/mysql-connector-java-5.1.6-bin.jar:/opt/YOYO/YOYOServer.jar:/opt/YOYO/mail.jar:/opt/YOYO/activation.jar:/opt/YOYO/YOYO_Interfaces.jar:/opt/YOYO/commons-daemon-1.0.7.jar:/opt/YOYO/log4j-1.2.14.jar:/opt/YOYO/Mesp.jar" (0x00000000)
06/11/2011 14:40:15 10626 jsvc.exec debug: +-------------------------------------------------------
06/11/2011 14:40:15 10626 jsvc.exec debug: Java VM created successfully
06/11/2011 14:40:15 10626 jsvc.exec debug: Class org/apache/commons/daemon/support/DaemonLoader found
06/11/2011 14:40:15 10626 jsvc.exec debug: Native methods registered
06/11/2011 14:40:15 10626 jsvc.exec error: Cannot found Daemon Loader "version" entry point
06/11/2011 14:40:15 10625 jsvc.exec error: Service exit with a return value of 255

Not sure why DaemonLoader is found but missing "version entry point".  

Any help with the entry point issue would be appreciated.
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Sarge516

ASKER

Ok, I'm scaled down it way and I still get the Cannot found Daemon Loader "version" entry point

Test code is attached. Is it complete ?

 I've tested against the commons-deamon-1.0.5 and 1.0.7 jar versions.

I've change my JRE to be the Oracle Linux instead of Icetea.

What am I missing ?  Does anyone else run jsvc with success ?

Thanks.


Error is now

08/11/2011 12:33:00 3731 jsvc.exec debug: Using default JVM in /opt/java/jre1.6.0_29/lib/amd64/server/libjvm.so
08/11/2011 12:33:00 3731 jsvc.exec debug: Attemtping to load library /opt/java/jre1.6.0_29/lib/amd64/server/libjvm.so
08/11/2011 12:33:00 3731 jsvc.exec debug: JVM library /opt/java/jre1.6.0_29/lib/amd64/server/libjvm.so loaded
08/11/2011 12:33:00 3731 jsvc.exec debug: JVM library entry point found (0x8C11E570)
08/11/2011 12:33:00 3731 jsvc.exec debug: +-- DUMPING JAVA VM CREATION ARGUMENTS -----------------
08/11/2011 12:33:00 3731 jsvc.exec debug: | Version:                       10004
08/11/2011 12:33:00 3731 jsvc.exec debug: | Ignore Unrecognized Arguments: False
08/11/2011 12:33:00 3731 jsvc.exec debug: | Extra options:                 2
08/11/2011 12:33:00 3731 jsvc.exec debug: |   "-Djava.class.path=:/opt/jsvct1/commons-daemon-1.0.5.jar:/opt/jsvct1/testme.jar" (0x00000000)
08/11/2011 12:33:00 3731 jsvc.exec debug: +-------------------------------------------------------
08/11/2011 12:33:00 3731 jsvc.exec debug: Java VM created successfully
08/11/2011 12:33:00 3731 jsvc.exec debug: Class org/apache/commons/daemon/support/DaemonLoader found
08/11/2011 12:33:00 3731 jsvc.exec debug: Native methods registered
08/11/2011 12:33:00 3731 jsvc.exec error: Cannot found Daemon Loader "version" entry point
08/11/2011 12:33:00 3730 jsvc.exec error: Service exit with a return value of 255


package test1;

import org.apache.commons.daemon.Daemon;
import org.apache.commons.daemon.DaemonContext;
import org.apache.commons.daemon.DaemonInitException;

public class RunDaemon implements Daemon {

	RunMe rm = null;

	@Override
	public void destroy() {
		//rm = null;

	}

	@Override
	public void init(DaemonContext arg0) throws DaemonInitException, Exception {
		rm = new RunMe();

	}

	@Override
	public void start() throws Exception {
		rm.myStart();
	}

	@Override
	public void stop() throws Exception {
		rm.myStop();

	}

}

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package test1;

import java.util.Date;


public class RunMe {


	boolean stopme = false;
	Date startDate = new Date();
	Date endDate = startDate;
	
	public void myStart() {

		
		startDate = new Date();
		while (false == stopme)
		{
//			System.out.println(new Date());
			try {
				Thread.sleep(1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
		endDate = new Date();
		System.out.println("END OF PROGRAM");
	}

	
	public void myStop() {
		System.out.println("MyStop");
		stopme = true;

	}
	
	public void status() {
		System.out.println("Start Date = "+startDate);
		System.out.println("End Date = "+endDate);
		
	}

	

}

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CEHJ
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I'll give it a try with Sun Java if i can
ASKER CERTIFIED SOLUTION
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CEHJ
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Avatar of Sarge516
Sarge516

ASKER

My problem was related to the -version option in the run line. "-version" shows to be a valid option under jsvc but was the reason the code could not start.

The javadoc http://commons.apache.org/daemon/apidocs/index.html refers to the version method, but not much is mentioned.

[root@bmMail001 BMO]# /usr/bin/jsvc --help
Usage: jsvc [-options] class [args...]

Where options include:

    -jvm <JVM name>
        use a specific Java Virtual Machine. Available JVMs:
            'server'
    -cp / -classpath <directories and zip/jar files>
        set search path for service classes and resouces
    -home <directory>
        set the path of your JDK or JRE installation (or set
        the JAVA_HOME environment variable)
    -version
        show the current Java environment version (to check
        correctness of -home and -jvm. Implies -nodetach)
    -help / -?
        show this help page (implies -nodetach)
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CEHJ
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Anyway i can tell you why  "Cannot found Daemon Loader "version" entry point" happens, but can't explain it. It happens when it can't get that static method via a jni call:

http://svn.apache.org/repos/asf/commons/proper/daemon/trunk/src/native/unix/native/java.c

Apart from having the same problem with using the -version parameter, i can manage to run your code ok with jsvc