David Yan created APEXCORE-466:
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Summary: Improve logging from the *Agent.java files
Key: APEXCORE-466
URL: https://issues.apache.org/jira/browse/APEXCORE-466
Project: Apache Apex Core
Issue Type: Improvement
Reporter: David Yan
Assignee: David Yan
Currently we are getting stack traces logging that actually do not necessarily
indicate an error. For example:
{code}
2016-05-20 11:56:22,859 WARN com.datatorrent.stram.client.EventsAgent: Got
exception when reading events
java.io.FileNotFoundException: File does not exist:
/user/david/datatorrent/apps/application_1462948052533_0204/events/index.txt
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:66)
at
org.apache.hadoop.hdfs.server.namenode.INodeFile.valueOf(INodeFile.java:56)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsUpdateTimes(FSNamesystem.java:1932)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocationsInt(FSNamesystem.java:1873)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1853)
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getBlockLocations(FSNamesystem.java:1825)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.getBlockLocations(NameNodeRpcServer.java:559)
at
org.apache.hadoop.hdfs.server.namenode.AuthorizationProviderProxyClientProtocol.getBlockLocations(AuthorizationProviderProxyClientProtocol.j
ava:87)
at
org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.getBlockLocations(ClientNamenodeProtocolServerSideTranslatorP
B.java:363)
at
org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.
java)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:619)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1060)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2044)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2040)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1671)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2038)
{code}
This stack trace only indicates that no events have been logged yet for the
application.
We need to reduce this kind of logging to prevent false alarms to the user.
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