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10-19-2017 11:14 PM
I'm following the document to attach java agent to running VM.
But i get java exception while doing it, below is the output for my command:
[root@tropo-102 ~]# ps -ef | grep java | grep -v grep| awk '{print $2}'
10592
[root@tropo-102 ~]#
[root@tropo-102 ~]# /opt/voxeo/prism/jre/bin/java -Xbootclasspath/a:/opt/voxeo/prism/jre/lib/tools.jar -jar /root/appdynamics/javaagent.jar 10592
Attaching to VM [10592]
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.singularity.ee.agent.appagent.AgentEntryPoint.main(AgentEntryPoint.java:754)
Caused by: com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
at sun.tools.attach.LinuxVirtualMachine.<init>(LinuxVirtualMachine.java:106)
at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:208)
... 5 more
Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at com.singularity.ee.agent.appagent.AgentEntryPoint.main(AgentEntryPoint.java:768)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.singularity.ee.agent.appagent.AgentEntryPoint.main(AgentEntryPoint.java:754)
Caused by: com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
at sun.tools.attach.LinuxVirtualMachine.<init>(LinuxVirtualMachine.java:106)
at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:208)
... 5 more
Any one aware of this issue? my Operation system is centOS 6.7
BR
jack
10-19-2017 11:17 PM
BTW, i have change the owern of the agent to my application user in order to elimiate permission problem
10-20-2017 08:20 AM - edited 10-20-2017 08:20 AM
What JVM version are you using? The symptoms look similar to those described here.
10-22-2017 07:23 PM
Hi,
Thanks for your feedback. My JDK is 1.8.0. Looks like the workaround is not work in my issue.
[root@tropo-102 ~]# /opt/voxeo/prism/jre/bin/java -version
java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)
[root@tropo-102 ~]# ps -ef | grep java
voxeo 10592 10573 8 Oct20 ? 06:08:12 /opt/voxeo/prism/jre/bin/java -Dwrapper.key=OuYamULl31LbphFW -Dwrapper.port=32000 -Dvoxeo.config-dir=/opt/voxeo/prism/conf -Dproduct-name=prism -Dcom.sun.management.jmxremote -Djava.endorsed.dirs=/opt/voxeo/prism/common/endorsed -Djava.library.path=/opt/voxeo/prism/lib -Dkernel.home=/opt/voxeo/prism -Dcom.voxeolabs.aes.key=/opt/voxeo/prism/conf/aeskey -Dwrapper.native_library=wrapper -Dwrapper.version=3.2.3 -Dlog4j.ignoreTCL=true -Dfile.encoding=utf-8 -Djava.net.preferIPv4Stack=true -Djava.util.logging.config.file=/opt/voxeo/prism/conf/logging.properties -Dorg.tanukisoftware.wrapper.WrapperSimpleApp.waitForStartMain=TRUE -Dsun.net.inetaddr.ttl=60 -Dsun.net.client.defaultReadTimeout=60000 -Dsun.net.client.defaultConnectTimeout=60000 -Djava.rmi.server.RMIClassLoaderSpi=com.micromethod.sipmethod.server.SIPMethodRMIClassLoaderSpi -Djava.rmi.server.useCodebaseOnly=false -Dlog4j.configurationFile=/opt/voxeo/prism/conf/log4j2.xml -DLog4jContextSelector=org.apache.logging.log4j.core.async.AsyncLoggerContextSelector -DAsyncLogger.WaitStrategy=Sleep -DAsyncLogger.RingBufferSize=262144 -Dcom.micromethod.sipmethod.server.cluster.logmc=false -Dh2.bindAddress=127.0.0.1 -Dcom.voxeo.sipmethod.server.launcher.main.block=true -Dnet.sf.ehcache.enableShutdownHook=true -Ddns.defaultQueryTimeout=10000 -Djava.security.egd=file:/dev/./urandom -Dcom.sun.phobos.javascript.useInterpreter=true -Dcom.voxeolabs.moho.suppressEarlyMedia=true -Dcom.voxeolabs.moho.copyHeadersForContinueRouting=false -classpath /opt/voxeo/prism/lib/jars/bcpkix-jdk15on-149b13.jar:/opt/voxeo/prism/lib/jars/bcprov-ext-jdk15on-149b13.jar:/opt/voxeo/prism/lib/jars/common-api.jar:/opt/voxeo/prism/lib/jars/commons-codec-1.4.jar:/opt/voxeo/prism/lib/jars/disruptor-3.3.5.jar:/opt/voxeo/prism/lib/jars/dom4j-1.6.1.jar:/opt/voxeo/prism/lib/jars/kernel-launcher.jar:/opt/voxeo/prism/lib/jars/kernel-utils.jar:/opt/voxeo/prism/lib/jars/log4j-1.2-api-2.6.2.jar:/opt/voxeo/prism/lib/jars/log4j-api-2.6.2.jar:/opt/voxeo/prism/lib/jars/log4j-core-2.6.2.jar:/opt/voxeo/prism/lib/jars/protobuf-java-2.6.0.jar:/opt/voxeo/prism/lib/jars/server-launcher.jar:/opt/voxeo/prism/lib/jars/server-tools.jar:/opt/voxeo/prism/lib/jars/server-utils.jar:/opt/voxeo/prism/lib/jars/servlet-api.jar:/opt/voxeo/prism/lib/jars/tropo-lic.jar:/opt/voxeo/prism/lib/jars/utils-apache.jar:/opt/voxeo/prism/lib/jars/vlib-core-12.2.25.jar:/opt/voxeo/prism/lib/jars/voxeolabs-util.jar:/opt/voxeo/prism/lib/jars/vsm-lib.jar:/opt/voxeo/prism/lib/jars/wrapper.jar:/opt/voxeo/prism/lib/jars/xmppservlet-api.jar:/opt/voxeo/prism/jre/lib/tools.jar:/opt/voxeo/prism/conf -server -Xms2G -Xmx2G -XX:+UseG1GC -XX:NewRatio=3 -XX:SurvivorRatio=8 -XX:MetaspaceSize=256m -XX:MaxMetaspaceSize=512m -Xloggc:/tropo_logs/gclog.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=100 -XX:GCLogFileSize=20M -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution -XX:+PrintGCApplicationConcurrentTime -XX:+PrintGCApplicationStoppedTime -XX:ErrorFile=/tropo_logs/java_error_pid%p.log -XX:-HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/tropo_logs/java_heap_pid%p.hprof -XX:+PrintAdaptiveSizePolicy -XX:+ParallelRefProcEnabled org.tanukisoftware.wrapper.WrapperSimpleApp com.micromethod.sipmethod.server.Launcher -start
[root@tropo-102 ~]# /opt/voxeo/prism/jre/bin/java -XX:+StartAttachListener -Xbootclasspath/a:/opt/voxeo/prism/jre/lib/tools.jar -jar /root/appdynamics/javaagent.jar 10592
Attaching to VM [10592]
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.singularity.ee.agent.appagent.AgentEntryPoint.main(AgentEntryPoint.java:754)
Caused by: com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
at sun.tools.attach.LinuxVirtualMachine.<init>(LinuxVirtualMachine.java:106)
at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:208)
... 5 more
Exception in thread "main" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at com.singularity.ee.agent.appagent.AgentEntryPoint.main(AgentEntryPoint.java:768)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.singularity.ee.agent.appagent.AgentEntryPoint.main(AgentEntryPoint.java:754)
Caused by: com.sun.tools.attach.AttachNotSupportedException: Unable to open socket file: target process not responding or HotSpot VM not loaded
at sun.tools.attach.LinuxVirtualMachine.<init>(LinuxVirtualMachine.java:106)
at sun.tools.attach.LinuxAttachProvider.attachVirtualMachine(LinuxAttachProvider.java:63)
at com.sun.tools.attach.VirtualMachine.attach(VirtualMachine.java:208)
... 5 more
BR
10-24-2017 05:36 AM - edited 10-24-2017 05:36 AM
Looking at the above command line, it seems that the java process you are targetting for instrumentation is the Tanuki simple wrapper.
By default, this will wait 2 seconds and then exit, after starting the actual application program which is is wrapping, so I wonder if it has already exitted by the time you run the attach?
I also wonder whether instrumenting the wrapper with AppDynamics is what you want to do? You are probably better instrumenting the process that the wrapper starts (or amending the wrapper.app.n properties to add in the -javaagent option to start the wrapped app together with the agent as it boots)
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