[HDDS-673] Suppress "Key not found" exception log with stack trace in OM

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.3.0, 0.4.0
• Target Version/s: 0.3.0
• Assignee: Arpit Agarwal
• Reporter: Xiaoyu Yao
• Created: 16/Oct/18 23:56
• Updated: 18/Oct/18 19:28
• Resolved: 18/Oct/18 18:52

Description

We have observed too many KNF exception stack trace from OM logs.

	2018-10-16 21:20:40,248 ERROR org.apache.hadoop.ozone.om.KeyManagerImpl: Get key failed for volume:volume2 bucket:bucket2 key:testo3/.hive-staging_hive_2018-10-16_21-20-29_158_7074026959914132025-1
	org.apache.hadoop.ozone.om.exceptions.OMException: Key not found
	        at org.apache.hadoop.ozone.om.KeyManagerImpl.lookupKey(KeyManagerImpl.java:368)
	        at org.apache.hadoop.ozone.om.OzoneManager.lookupKey(OzoneManager.java:881)
	        at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.lookupKey(OzoneManagerProtocolServerSideTranslatorPB.java:400)
	        at org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos$OzoneManagerService$2.callBlockingMethod(OzoneManagerProtocolProtos.java:39299)
	        at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
	        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
	        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
	        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
	        at java.security.AccessController.doPrivileged(Native Method)
	        at javax.security.auth.Subject.doAs(Subject.java:422)
	        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
	        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)