[HDFS-10766] Exceptions thrown by requestShortCircuitFdsForRead can be lost

• Type: Bug
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Component/s: logging
• Labels: patch

Environment

HDP-2.4

• Flags: Patch
• Assignee: Karthik Palanisamy
• Reporter: Karthik Palanisamy
• Created: 16/Aug/16 11:54
• Updated: 21/Aug/16 19:27

Description

There was some error while creating requestShortCircuitFdsForRead and the exception is thrown when logging the info message

In this scenario, the actual exception was lost

To get the actual exception message it needs to be handled properly.

2016-07-25 13:11:54,323 ERROR datanode.DataNode (DataXceiver.java:run(278)) - xyz.com:50010:DataXceiver error processing REQUEST_SHORT_CIRCUIT_FDS operation src: unix:/var/lib/hadoop-hdfs/dn_socket dst: <local>
org.apache.hadoop.fs.InvalidRequestException: there is no shared memory segment registered with shmId 0773fa8b13b4643cb5be98893af5a873
at org.apache.hadoop.hdfs.server.datanode.ShortCircuitRegistry.unregisterSlot(ShortCircuitRegistry.java:371)
at org.apache.hadoop.hdfs.server.datanode.DataXceiver.requestShortCircuitFds(DataXceiver.java:364)
at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opRequestShortCircuitFds(Receiver.java:187)
at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:89)
at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:251)
at java.lang.Thread.run(Thread.java:745)