Utilisez TMDA pour analyser IBM Java javacore
TL;DR
- IBM Java a un format unique (javacore) pour les thread dumps, qui est différent de HotSpot.
- \ * Dans l'environnement inux, vous pouvez obtenir javacore avec
kill -3, mais pour lire ceci, TMDA -dump-analyzer-java-tmda) semble bon à utiliser
javacore et TMDA
Lors de l'obtention d'un vidage de thread avec IBM Java, cela semble être effectué par la procédure suivante.
Collectez javacore (https://www.ibm.com/support/knowledgecenter/ja/SS7J6S_7.5.0/com.ibm.websphere.wesb.administering.doc/topics/rtroub_capture_java_core.html)
Dans l'environnement \ * inux, c'est kill -3.
Vous pouvez obtenir javacore ici.
Cependant, le javacore qui peut être obtenu ici semble être dans un format très différent de HotSpot, ce qui le rend un peu difficile à lire.
Par conséquent, il semble qu'il sera plus facile de voir si vous analysez javacore à l'aide d'IBM Thread et Monitor Dump Analyzer for Java (TMDA).
Outils de diagnostic JVM open source IBM et SAP
IBM Thread and Monitor Dump Analyzer for Java (TMDA)
Essayez d'obtenir javacore
Faisons un essai. J'ai une image IBM Java Docker, je vais donc essayer de l'utiliser.
Démarrez le conteneur.
$ docker container run -it --rm --name ibmjava ibmjava:8 bash
# java -version
java version "1.8.0_241"
Java(TM) SE Runtime Environment (build 8.0.6.5 - pxa6480sr6fp5-20200111_02(SR6 FP5))
IBM J9 VM (build 2.9, JRE 1.8.0 Linux amd64-64-Bit Compressed References 20200108_436782 (JIT enabled, AOT enabled)
OpenJ9 - 7d1059c
OMR - d059105
IBM - c8aee39)
JCL - 20200110_01 based on Oracle jdk8u241-b07
Utilisez Apache Tomcat comme cible pour l'acquisition de javacore.
# cd
# wget http://ftp.yz.yamagata-u.ac.jp/pub/network/apache/tomcat/tomcat-9/v9.0.31/bin/apache-tomcat-9.0.31.tar.gz
# tar xf apache-tomcat-9.0.31.tar.gz
# cd apache-tomcat-9.0.31
root@fbb2898f4717:~/apache-tomcat-9.0.31# bin/startup.sh
Using CATALINA_BASE: /root/apache-tomcat-9.0.31
Using CATALINA_HOME: /root/apache-tomcat-9.0.31
Using CATALINA_TMPDIR: /root/apache-tomcat-9.0.31/temp
Using JRE_HOME: /opt/ibm/java/jre
Using CLASSPATH: /root/apache-tomcat-9.0.31/bin/bootstrap.jar:/root/apache-tomcat-9.0.31/bin/tomcat-juli.jar
Tomcat started.
Tomcat a commencé.
Envoie un signal «-3» (SIGQUIT) au processus Tomcat.
# kill -3 [PID]
javacore est sorti.
# ls -l
total 608
-rw-r----- 1 root root 18982 Feb 5 19:36 BUILDING.txt
-rw-r----- 1 root root 5409 Feb 5 19:36 CONTRIBUTING.md
-rw-r----- 1 root root 57092 Feb 5 19:36 LICENSE
-rw-r----- 1 root root 2333 Feb 5 19:36 NOTICE
-rw-r----- 1 root root 3255 Feb 5 19:36 README.md
-rw-r----- 1 root root 6898 Feb 5 19:36 RELEASE-NOTES
-rw-r----- 1 root root 16262 Feb 5 19:36 RUNNING.txt
drwxr-x--- 2 root root 4096 Feb 17 03:40 bin
drwx------ 3 root root 4096 Feb 17 03:40 conf
-rw-r----- 1 root root 472769 Feb 17 03:41 javacore.20200217.034113.22.0001.txt
drwxr-x--- 2 root root 4096 Feb 17 03:40 lib
drwxr-x--- 2 root root 4096 Feb 17 03:40 logs
drwxr-x--- 2 root root 4096 Feb 17 03:40 temp
drwxr-x--- 7 root root 4096 Feb 5 19:34 webapps
drwxr-x--- 3 root root 4096 Feb 17 03:40 work
Légèrement, jetons un coup d'œil à l'intérieur.
# cat javacore.20200217.034113.22.0001.txt
0SECTION TITLE subcomponent dump routine
NULL ===============================
1TICHARSET ANSI_X3.4-1968
1TISIGINFO Dump Event "user" (00004000) received
1TIDATETIME Date: 2020/02/17 at 03:41:13:542
1TINANOTIME System nanotime: 13446928231692
1TIFILENAME Javacore filename: /root/apache-tomcat-9.0.31/javacore.20200217.034113.22.0001.txt
1TIREQFLAGS Request Flags: 0x81 (exclusive+preempt)
1TIPREPSTATE Prep State: 0x104 (exclusive_vm_access+trace_disabled)
NULL ------------------------------------------------------------------------
0SECTION GPINFO subcomponent dump routine
NULL ================================
2XHOSLEVEL OS Level : Linux 4.15.0-76-generic
2XHCPUS Processors -
3XHCPUARCH Architecture : amd64
3XHNUMCPUS How Many : 4
3XHNUMASUP NUMA is either not supported or has been disabled by user
NULL
1XHERROR2 Register dump section only produced for SIGSEGV, SIGILL or SIGFPE.
NULL
NULL ------------------------------------------------------------------------
0SECTION ENVINFO subcomponent dump routine
NULL =================================
1CIJAVAVERSION JRE 1.8.0 Linux amd64-64 (build 8.0.6.5 - pxa6480sr6fp5-20200111_02(SR6 FP5))
1CIVMVERSION 20200108_436782
1CIJ9VMVERSION 7d1059c
1CIJITVERSION tr.open_20200107_095049_7d1059c
1CIOMRVERSION d059105_CMPRSS
1CIIBMVERSION c8aee39
1CIJITMODES JIT enabled, AOT enabled, FSD disabled, HCR enabled
1CIRUNNINGAS Running as a standalone JVM
1CIVMIDLESTATE VM Idle State: ACTIVE
1CICONTINFO Running in container : TRUE
1CICGRPINFO JVM support for cgroups enabled : TRUE
1CISTARTTIME JVM start time: 2020/02/17 at 03:40:38:297
1CISTARTNANO JVM start nanotime: 13411683675953
1CIPROCESSID Process ID: 22 (0x16)
1CICMDLINE /opt/ibm/java/jre/bin/java -Djava.util.logging.config.file=/root/apache-tomcat-9.0.31/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.protocol.handler.pkgs=org.apache.catalina.webresources -Dorg.apache.catalina.security.SecurityListener.UMASK=0027 -Dignore.endorsed.dirs= -classpath /root/apache-tomcat-9.0.31/bin/bootstrap.jar:/root/apache-tomcat-9.0.31/bin/tomcat-juli.jar -Dcatalina.base=/root/apache-tomcat-9.0.31 -Dcatalina.home=/root/apache-tomcat-9.0.31 -Djava.io.tmpdir=/root/apache-tomcat-9.0.31/temp org.apache.catalina.startup.Bootstrap start
1CIJAVAHOMEDIR Java Home Dir: /opt/ibm/java/jre
1CIJAVADLLDIR Java DLL Dir: /opt/ibm/java/jre/bin
1CISYSCP Sys Classpath: /opt/ibm/java/jre/lib/amd64/compressedrefs/jclSC180/vm.jar;/opt/ibm/java/jre/lib/se-service.jar;/opt/ibm/java/jre/lib/math.jar;/opt/ibm/java/jre/lib/ibmorb.jar;/opt/ibm/java/jre/lib/ibmorbapi.jar;/opt/ibm/java/jre/lib/ibmcfw.jar;/opt/ibm/java/jre/lib/ibmpkcs.jar;/opt/ibm/java/jre/lib/ibmcertpathfw.jar;/opt/ibm/java/jre/lib/ibmjgssfw.jar;/opt/ibm/java/jre/lib/ibmjssefw.jar;/opt/ibm/java/jre/lib/ibmsaslfw.jar;/opt/ibm/java/jre/lib/ibmjcefw.jar;/opt/ibm/java/jre/lib/ibmjgssprovider.jar;/opt/ibm/java/jre/lib/ibmjsseprovider2.jar;/opt/ibm/java/jre/lib/ibmcertpathprovider.jar;/opt/ibm/java/jre/lib/xmldsigfw.jar;/opt/ibm/java/jre/lib/xml.jar;/opt/ibm/java/jre/lib/charsets.jar;/opt/ibm/java/jre/lib/resources.jar;/opt/ibm/java/jre/lib/rt.jar;/opt/ibm/java/jre/lib/dataaccess.jar;
1CIUSERARGS UserArgs:
2CIUSERARG -Xoptionsfile=/opt/ibm/java/jre/lib/amd64/compressedrefs/options.default
2CIUSERARG -Xlockword:mode=default,noLockword=java/lang/String,noLockword=java/util/MapEntry,noLockword=java/util/HashMap$Entry,noLockword=org/apache/harmony/luni/util/ModifiedMap$Entry,noLockword=java/util/Hashtable$Entry,noLockword=java/lang/invoke/MethodType,noLockword=java/lang/invoke/MethodHandle,noLockword=java/lang/invoke/CollectHandle,noLockword=java/lang/invoke/ConstructorHandle,noLockword=java/lang/invoke/ConvertHandle,noLockword=java/lang/invoke/ArgumentConversionHandle,noLockword=java/lang/invoke/AsTypeHandle,noLockword=java/lang/invoke/ExplicitCastHandle,noLockword=java/lang/invoke/FilterReturnHandle,noLockword=java/lang/invoke/DirectHandle,noLockword=java/lang/invoke/ReceiverBoundHandle,noLockword=java/lang/invoke/DynamicInvokerHandle,noLockword=java/lang/invoke/FieldHandle,noLockword=java/lang/invoke/FieldGetterHandle,noLockword=java/lang/invoke/FieldSetterHandle,noLockword=java/lang/invoke/StaticFieldGetterHandle,noLockword=java/lang/invoke/StaticFieldSetterHandle,noLockword=java/lang/invoke/IndirectHandle,noLockword=java/lang/invoke/InterfaceHandle,noLockword=java/lang/invoke/VirtualHandle,noLockword=java/lang/invoke/PrimitiveHandle,noLockword=java/lang/invoke/InvokeExactHandle,noLockword=java/lang/invoke/InvokeGenericHandle,noLockword=java/lang/invoke/VarargsCollectorHandle,noLockword=java/lang/invoke/ThunkTuple
2CIUSERARG -Xjcl:jclse29
2CIUSERARG -Dcom.ibm.oti.vm.bootstrap.library.path=/opt/ibm/java/jre/lib/amd64/compressedrefs:/opt/ibm/java/jre/lib/amd64
2CIUSERARG -Dsun.boot.library.path=/opt/ibm/java/jre/lib/amd64/compressedrefs:/opt/ibm/java/jre/lib/amd64
2CIUSERARG -Djava.library.path=/opt/ibm/java/jre/lib/amd64/compressedrefs:/opt/ibm/java/jre/lib/amd64:/usr/lib64:/usr/lib
2CIUSERARG -Djava.home=/opt/ibm/java/jre
2CIUSERARG -Djava.ext.dirs=/opt/ibm/java/jre/lib/ext
2CIUSERARG -Duser.dir=/root/apache-tomcat-9.0.31
2CIUSERARG -XX:+UseContainerSupport
2CIUSERARG -Djava.class.path=.
~ abrégé ~
3CLTEXTCLASS org/apache/tomcat/util/IntrospectionUtils$SecurePropertySource(0x00000000019DEE00)
3CLTEXTCLASS [Lorg/apache/tomcat/util/IntrospectionUtils$PropertySource;(0x00000000019DEC00)
3CLTEXTCLASS org/apache/tomcat/util/IntrospectionUtils$PropertySource(0x00000000019DEA00)
3CLTEXTCLASS org/apache/tomcat/util/digester/SetPropertiesRule(0x00000000019DE800)
3CLTEXTCLASS org/apache/tomcat/util/digester/SetNextRule(0x00000000019DDF00)
3CLTEXTCLASS org/apache/tomcat/util/digester/FactoryCreateRule(0x00000000019DDB00)
3CLTEXTCLASS org/apache/tomcat/util/digester/CallParamRule(0x00000000019DD300)
3CLTEXTCLASS org/apache/tomcat/util/digester/CallMethodRule(0x00000000019DCC00)
3CLTEXTCLASS org/apache/tomcat/util/digester/Rules(0x00000000019DC500)
3CLTEXTCLASS org/apache/tomcat/util/digester/Digester(0x00000000019DC000)
3CLTEXTCLASS org/apache/catalina/Container(0x00000000019D1800)
3CLTEXTCLASS org/apache/tomcat/util/file/ConfigFileLoader(0x00000000019D1000)
3CLTEXTCLASS org/apache/tomcat/util/file/ConfigurationSource$1(0x00000000019D0D00)
3CLTEXTCLASS org/apache/catalina/startup/CatalinaBaseConfigurationSource(0x00000000019D0700)
3CLTEXTCLASS org/apache/tomcat/util/ExceptionUtils(0x00000000019D0000)
3CLTEXTCLASS org/apache/catalina/security/SecurityConfig(0x00000000019CFE00)
3CLTEXTCLASS org/apache/tomcat/util/res/StringManager$1(0x00000000019CF700)
3CLTEXTCLASS org/apache/tomcat/util/res/StringManager(0x00000000019CF200)
3CLTEXTCLASS org/apache/tomcat/util/log/SystemLogHandler(0x00000000019CE300)
3CLTEXTCLASS org/apache/catalina/LifecycleState(0x00000000019CDF00)
3CLTEXTCLASS org/apache/catalina/startup/Catalina$CatalinaShutdownHook(0x00000000019CB600)
3CLTEXTCLASS org/apache/tomcat/util/file/ConfigurationSource(0x00000000019CB100)
3CLTEXTCLASS org/apache/catalina/LifecycleException(0x00000000019CAE00)
3CLTEXTCLASS org/apache/catalina/startup/SetParentClassLoaderRule(0x00000000019CAA00)
3CLTEXTCLASS org/apache/tomcat/util/digester/RuleSet(0x00000000019CA800)
3CLTEXTCLASS org/apache/catalina/startup/CertificateCreateRule(0x00000000019CA400)
3CLTEXTCLASS org/apache/catalina/startup/AddPortOffsetRule(0x00000000019CA000)
3CLTEXTCLASS org/apache/catalina/startup/SetAllPropertiesRule(0x00000000019C9D00)
3CLTEXTCLASS org/apache/catalina/startup/ConnectorCreateRule(0x00000000019C9500)
3CLTEXTCLASS org/apache/catalina/startup/ListenerCreateRule(0x00000000019C8D00)
3CLTEXTCLASS org/apache/tomcat/util/digester/ObjectCreateRule(0x000000000197E300)
3CLTEXTCLASS org/apache/tomcat/util/digester/Rule(0x000000000197D700)
3CLTEXTCLASS org/apache/catalina/startup/Catalina(0x00000000019C0800)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E00DE640)
3CLTEXTCLASS sun/reflect/GeneratedMethodAccessor2(0x00000000019CCA00)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E013B110)
3CLTEXTCLASS sun/reflect/GeneratedMethodAccessor3(0x0000000001A52100)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E0261650)
3CLTEXTCLASS sun/reflect/GeneratedConstructorAccessor1(0x00000000018A8700)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E0301418)
3CLTEXTCLASS sun/reflect/GeneratedConstructorAccessor2(0x00000000018A8C00)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E0301460)
3CLTEXTCLASS sun/reflect/GeneratedMethodAccessor4(0x00000000018A9100)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E03014A8)
3CLTEXTCLASS sun/reflect/GeneratedMethodAccessor5(0x00000000018A9600)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E03014F0)
3CLTEXTCLASS sun/reflect/GeneratedMethodAccessor6(0x00000000018A9A00)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E0301538)
3CLTEXTCLASS sun/reflect/GeneratedMethodAccessor7(0x00000000018A9F00)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E0301580)
3CLTEXTCLASS sun/reflect/GeneratedMethodAccessor8(0x0000000001C0ED00)
2CLTEXTCLLOAD Loader sun/reflect/DelegatingClassLoader(0x00000000E03015C8)
3CLTEXTCLASS sun/reflect/GeneratedConstructorAccessor3(0x0000000001C17700)
NULL ------------------------------------------------------------------------
0SECTION Javadump End section
NULL ---------------------- END OF DUMP -------------------------------------
Il semble qu'un thread dump soit également inclus.
3XMTHREADINFO "main" J9VMThread:0x000000000177C700, omrthread_t:0x00007F30D8007C70, java/lang/Thread:0x00000000E0036A98, state:R, prio=5
3XMJAVALTHREAD (java/lang/Thread getId:0x1, isDaemon:false)
3XMTHREADINFO1 (native thread ID:0x17, native priority:0x5, native policy:UNKNOWN, vmstate:R, vm thread flags:0x000000a1)
3XMTHREADINFO2 (native stack address range from:0x00007F30DCC75000, to:0x00007F30DD475000, size:0x800000)
3XMCPUTIME CPU usage total: 2.041586755 secs, current category="Application"
3XMHEAPALLOC Heap bytes allocated since last GC cycle=1918344 (0x1D4588)
3XMTHREADINFO3 Java callstack:
4XESTACKTRACE at java/net/PlainSocketImpl.socketAccept(Native Method)
4XESTACKTRACE at java/net/AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:450)
4XESTACKTRACE at java/net/ServerSocket.implAccept(ServerSocket.java:623)
4XESTACKTRACE at java/net/ServerSocket.accept(ServerSocket.java:582)
4XESTACKTRACE at org/apache/catalina/core/StandardServer.await(StandardServer.java:609)
4XESTACKTRACE at org/apache/catalina/startup/Catalina.await(Catalina.java:721)
4XESTACKTRACE at org/apache/catalina/startup/Catalina.start(Catalina.java:667)
4XESTACKTRACE at sun/reflect/NativeMethodAccessorImpl.invoke0(Native Method)
4XESTACKTRACE at sun/reflect/NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
4XESTACKTRACE at sun/reflect/DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55(Compiled Code))
4XESTACKTRACE at java/lang/reflect/Method.invoke(Method.java:508(Compiled Code))
4XESTACKTRACE at org/apache/catalina/startup/Bootstrap.start(Bootstrap.java:343)
4XESTACKTRACE at org/apache/catalina/startup/Bootstrap.main(Bootstrap.java:474)
3XMTHREADINFO3 Native callstack:
4XENATIVESTACK (0x00007F30D7DD3852 [libj9prt29.so+0x50852])
4XENATIVESTACK (0x00007F30D7DA55E3 [libj9prt29.so+0x225e3])
4XENATIVESTACK (0x00007F30D7DD38CE [libj9prt29.so+0x508ce])
4XENATIVESTACK (0x00007F30D7DD39C4 [libj9prt29.so+0x509c4])
4XENATIVESTACK (0x00007F30D7DA55E3 [libj9prt29.so+0x225e3])
4XENATIVESTACK (0x00007F30D7DD372B [libj9prt29.so+0x5072b])
4XENATIVESTACK (0x00007F30D7DCFB0F [libj9prt29.so+0x4cb0f])
4XENATIVESTACK (0x00007F30DE456890 [libpthread.so.0+0x12890])
4XENATIVESTACK __poll+0x49 (0x00007F30DDD41BF9 [libc.so.6+0x114bf9])
4XENATIVESTACK JCL_Poll+0x5b (0x00007F30D27AB20B [libjava.so+0x1620b])
4XENATIVESTACK (0x00007F30C1653321 [libnet.so+0x14321])
4XENATIVESTACK Java_java_net_PlainSocketImpl_socketAccept+0x137 (0x00007F30C164D557 [libnet.so+0xe557])
4XENATIVESTACK (0x00007F30DC5DEDA4 [libj9vm29.so+0x13bda4])
4XENATIVESTACK (0x00007F30DC5DC4C7 [libj9vm29.so+0x1394c7])
4XENATIVESTACK (0x00007F30DC4C8AFE [libj9vm29.so+0x25afe])
4XENATIVESTACK (0x00007F30DC4B5930 [libj9vm29.so+0x12930])
4XENATIVESTACK (0x00007F30DC5772E2 [libj9vm29.so+0xd42e2])
NULL
Cependant, si vous êtes habitué au format HotSpot, vous serez confus.
Pour le moment, supprimez ce javacore côté hôte.
$ docker container cp ibmjava:/root/apache-tomcat-9.0.31/javacore.20200217.034113.22.0001.txt ./.
Utilisez TMDA
Jetons un coup d'œil au javacore obtenu en utilisant TMDA.
Téléchargez TMDA.
IBM Thread and Monitor Dump Analyzer for Java (TMDA)
$ wget https://public.dhe.ibm.com/software/websphere/appserv/support/tools/jca/jca464.jar
Commencez.
$ java -jar jca464.jar
Un outil comme celui-ci a démarré.
Cliquez ici pour la version au moment de la rédaction. Vous pouvez le vérifier dans Aide → À propos d'IBM Thread and Monitor Dump Analyzer for Java Technology dans le menu.
Maintenant, ouvrons javacore. Sélectionnez Ouvrir → Ouvrir les vidages de threads dans le menu pour ouvrir le javacore que vous avez obtenu précédemment.
Ensuite, les informations seront affichées comme ceci.
Si vous souhaitez voir des informations sur les threads, consultez les statistiques Thread Status Analytics et Thread Detail.
Cela vous donnera le format de vidage de thread familier (dans HotSpot).
De plus, TMDA semble être en mesure de voir de telles informations, il semble donc possible d'analyser à partir d'informations autres que les thread dumps.
Par exemple, dans l'analyse de l'utilisation du processeur, vous pouvez voir le taux d'utilisation du processeur pour chaque thread.
Si jamais vous utilisez IBM Java, vous devez garder TMDA à l'esprit.
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