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https://issues.apache.org/jira/browse/HDFS-8132?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14494847#comment-14494847
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Chris Nauroth commented on HDFS-8132:
-------------------------------------
Hello [~brahmareddy]. I don't really know anything about JCarder, but it looks
like the tool couldn't interpret some bytecode. I wonder if the tool is tied
to the Java 6 class format. Hadoop 2.7.0 is our first release that compiled
Java 7 class files. Hadoop 2.6.0 was compiled as Java 6.
> Namenode Startup Failing When we add Jcarder.jar in class Path
> --------------------------------------------------------------
>
> Key: HDFS-8132
> URL: https://issues.apache.org/jira/browse/HDFS-8132
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.0
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
>
> *{color:blue}Namenode while Startup Args{color}* ( Just added the jcarder
> args)
> exec /home/hdfs/jdk1.7.0_72/bin/java -Dproc_namenode -Xmx1000m
> -Djava.net.preferIPv4Stack=true
> -Dhadoop.log.dir=/opt/ClusterSetup/Hadoop2.7/install/hadoop/namenode/logs
> -Dhadoop.log.file=hadoop.log
> -Dhadoop.home.dir=/opt/ClusterSetup/Hadoop2.7/install/hadoop/namenode
> -Dhadoop.id.str=hdfs -Dhadoop.root.logger=INFO,console
> -Djava.library.path=/opt/ClusterSetup/Hadoop2.7/install/hadoop/namenode/lib/native
> -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true
> -Dhadoop.security.logger=INFO,RFAS -Dhdfs.audit.logger=INFO,NullAppender
> {color:red}-javaagent:/opt/Jcarder/jcarder.jar=outputdir=/opt/Jcarder/Output/nn-jcarder{color}
> -Dhadoop.security.logger=INFO,NullAppender
> org.apache.hadoop.hdfs.server.namenode.NameNode
> Setting outputdir to /opt/Jcarder/Output/nn-jcarder
> Starting JCarder (2.0.0/6) agent
> Opening for writing: /opt/Jcarder/Output/nn-jcarder/jcarder_events.db
> Opening for writing: /opt/Jcarder/Output/nn-jcarder/jcarder_contexts.db
> Not instrumenting standard library classes (AWT, Swing, etc.)
> JCarder agent initialized
> *{color:red}ERROR{color}*
> {noformat}
> Exception in thread "main" java.lang.VerifyError: Expecting a stackmap frame
> at branch target 21
> Exception Details:
> Location:
>
> org/apache/hadoop/hdfs/server/namenode/NameNode.createHAState(Lorg/apache/hadoop/hdfs/server/common/HdfsServerConstants$StartupOption;)Lorg/apache/hadoop/hdfs/server/namenode/ha/HAState;
> @4: ifeq
> Reason:
> Expected stackmap frame at this location.
> Bytecode:
> 0000000: 2ab4 02d2 9900 112b b203 08a5 000a 2bb2
> 0000010: 030b a600 07b2 030d b0b2 030f b0
> at java.lang.Class.getDeclaredMethods0(Native Method)
> at java.lang.Class.privateGetDeclaredMethods(Class.java:2615)
> at java.lang.Class.getMethod0(Class.java:2856)
> at java.lang.Class.getMethod(Class.java:1668)
> at sun.launcher.LauncherHelper.getMainMethod(LauncherHelper.java:494)
> at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:486)
> {noformat}
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