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Re: [Wrapper-user] ClassNotFoundException with WrapperSimpleApp
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From: Leif M. <lei...@ta...> - 2014-09-02 00:53:18
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Lin, Thank you for the update. I am glad you got it working. I am curious what it was about the jar that was causing java 6 to fail to open it. If it was problem with the class being compiled for Java 7 (which is too new) then that would have been a different exception. We will try to look into this on this end as I don't like the way that error was misleading. But I would appreciate it if you have any ideas from what you found. Cheers, Leif On Tue, Sep 2, 2014 at 7:40 AM, Lin Zhao <li...@ex...> wrote: > Leif, > > Thanks for the reply. We already had it figured out. It's the java > version. My jar is built with sbt, and somehow the java 6 jvm can't find > the main class. Once I ensure the right java 7 JAVA_HOME it works. > On Sep 1, 2014 12:58 AM, "Leif Mortenson" < > lei...@ta...> wrote: > >> Lin, >> I am sorry for the very slow reply. We somehow missed that this mail was >> stuck in moderation. >> >> I think this is a problem with your working directory. Remember that >> when the Wrapper runs, it ALWAYS forces the current working directory to be >> the location of the wrapper binary. >> This is done so that the Wrapper runs consistently regardless of how the >> Wrapper is launched. >> In your case, when running with the Wrapper, the working directory is: >> /Users/lin/git/exabeam/martini/java-wrapper/bin >> >> I am not 100% sure what it is when you are running directly with your >> command line. >> In both cases, your classpath looks like this: >> ../lib/martini.jar:../lib/wrapper.jar >> >> In the case of running with the Wrapper, this would mean that these files >> are both located in the following directory: >> /Users/lin/git/exabeam/martini/java-wrapper/lib >> >> A couple things that are confusing to me: >> >> 1) If the jar files had not been found, you would be seeing a message >> like the following in the logs just before the JVM is launched: >> DEBUG | wrapper | 2014/09/01 16:02:40.255 | | Classpath >> element, wrapper.java.classpath.3, does not exist: ../lib/foo.jar >> DEBUG | wrapper | 2014/09/01 16:02:40.255 | | Classpath >> element, wrapper.java.classpath.4, does not exist: ../xxx/bar.jar >> The lack of these messages in the log makes it look like both files exist >> >> 2) How are you launching the Wrapper? Is this on system startup? The >> working directory of the parent that launched the Wrapper was the root >> directory: >> DEBUG | wrapper | 2014/08/18 22:06:42 | P--W- | WRAPPER_INIT_DIR=/ >> This should not matter as the working directory was correctly changed to >> the location of the Wrapper binary: >> DEBUG | wrapper | 2014/08/18 22:06:42 | ---W- | >> WRAPPER_WORKING_DIR=/Users/lin/git/exabeam/martini/java-wrapper/bin >> >> In both cases, the WrapperSimpleApp class is being located and loaded >> correctly. That class simply locates the "com.exabeam.martini.Martini" >> class by name in the same ClassLoader without doing anything special. >> >> If none of these hints help, would it be possible to get a tar of your >> application sent to su...@ta...? We should only need the >> martini.jar to be able to see if it locates your main class. But I am also >> interested in seeing the relative location of files. >> >> Cheers, >> Leif >> >> >> >> >> >> >> On Tue, Aug 19, 2014 at 2:13 PM, Lin Zhao <li...@ex...> wrote: >> >>> My previous post didn't get through so I'm reposting. >>> >>> I've been trying to use WrapperSimpleApp and have a >>> ClassNotFoundException that I can't explain. >>> >>> The .conf has the jar that includes the main class, and you can see from >>> the wrapper debug log that it's included to -classpath. But the wrapper >>> fails to find it. >>> >>> Attaching the wrapper debug log. >>> >>> In the log, you can see: >>> >>> *DEBUG | wrapper | 2014/08/18 15:19:08 | Command[7] : >>> ../lib/martini.jar:../lib/wrapper.jar* >>> >>> martini.jar has com.exabeam.martini.Martini, yet the wrapper can't find >>> it. >>> >>> *INFO | jvm 1 | 2014/08/18 15:19:08 | WrapperSimpleApp Error: >>> Unable to locate the class com.exabeam.martini.Martini : >>> java.lang.ClassNotFoundException: com.exabeam.martini.Martini* >>> When the wrapper repeatedly retries, I captured the task command (via >>> ps) as: >>> >>> *501 44180 44168 0 9:57PM ttys008 0:00.47 /usr/bin/java -d64 >>> -Dlog4j.configuration=file:///Users/lin/git/exabeam/martini/src/main/resources/log4j.properties >>> -Dspark.cleaner.ttl=300 -Xmx14000m -Djava.library.path=../lib -classpath >>> ../lib/martini.jar:../lib/wrapper.jar -Dwrapper.key=JXisZluSb14SpUBv >>> -Dwrapper.port=32000 -Dwrapper.jvm.port.min=31000 >>> -Dwrapper.jvm.port.max=31999 -Dwrapper.debug=TRUE -Dwrapper.pid=44168 >>> -Dwrapper.version=3.5.25 -Dwrapper.native_library=wrapper >>> -Dwrapper.arch=universal -Dwrapper.cpu.timeout=10 -Dwrapper.jvmid=3 >>> org.tanukisoftware.wrapper.WrapperSimpleApp com.exabeam.martini.Martini >>> /Users/lin/git/exabeam/martini/config/custom/exabeam_config_imperva.conf* >>> >>> If I run below command directly, WrapperSimpleApp is able to find and >>> launch my main method, after which it failed for application specific >>> reason. >>> >>> *java -classpath ../lib/martini.jar:../lib/wrapper.jar >>> org.tanukisoftware.wrapper.WrapperSimpleApp com.exabeam.martini.Martini >>> /Users/lin/git/exabeam/martini/config/custom/exabeam_config_imperva.conf* >>> >>> Output: >>> >>> *WrapperManager: Initializing...* >>> >>> *WrapperManager: WARNING - The version of the Wrapper which launched >>> this JVM is* >>> >>> *WrapperManager: "unknown" while the version of the native >>> library* >>> >>> *WrapperManager: is "3.5.25".* >>> >>> *WrapperManager: The Wrapper may appear to work correctly but >>> some features may* >>> >>> *WrapperManager: not function correctly. This configuration >>> has not been tested* >>> >>> *WrapperManager: and is not supported.* >>> >>> *WrapperManager: * >>> >>> *2014-08-18 22:00:11.924 INFO ************************ >>> >>> *2014-08-18 22:00:11.925 INFO Martini started.* >>> Attaching the log and the conf. Thanks for the help. >>> >>> |
