[HBASE-5883] Backup master is going down due to connection refused exception

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.90.6, 0.92.1, 0.94.0
• Fix Version/s: 0.94.1, 0.95.0
• Component/s: master
• Hadoop Flags: Reviewed
• Assignee: Jieshan Bean
• Reporter: Gopinathan A
• Created: 26/Apr/12 10:34
• Updated: 26/Feb/13 16:56
• Resolved: 17/Jul/12 21:35

Description

The active master node network was down for some time (This node contains Master,DN,ZK,RS). Here backup node got
notification, and started to became active. Immedietly backup node got aborted with the below exception.

2012-04-09 10:42:24,270 INFO org.apache.hadoop.hbase.master.SplitLogManager: finished splitting (more than or equal to) 861248320 bytes in 4 log files in [hdfs://192.168.47.205:9000/hbase/.logs/HOST-192-168-47-202,60020,1333715537172-splitting] in 26374ms
2012-04-09 10:42:24,316 FATAL org.apache.hadoop.hbase.master.HMaster: Master server abort: loaded coprocessors are: []
2012-04-09 10:42:24,333 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
java.io.IOException: java.net.ConnectException: Connection refused
	at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:375)
	at org.apache.hadoop.hbase.ipc.HBaseClient.getConnection(HBaseClient.java:1045)
	at org.apache.hadoop.hbase.ipc.HBaseClient.call(HBaseClient.java:897)
	at org.apache.hadoop.hbase.ipc.WritableRpcEngine$Invoker.invoke(WritableRpcEngine.java:150)
	at $Proxy13.getProtocolVersion(Unknown Source)
	at org.apache.hadoop.hbase.ipc.WritableRpcEngine.getProxy(WritableRpcEngine.java:183)
	at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:303)
	at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:280)
	at org.apache.hadoop.hbase.ipc.HBaseRPC.getProxy(HBaseRPC.java:332)
	at org.apache.hadoop.hbase.ipc.HBaseRPC.waitForProxy(HBaseRPC.java:236)
	at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1276)
	at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1233)
	at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.getHRegionConnection(HConnectionManager.java:1220)
	at org.apache.hadoop.hbase.catalog.CatalogTracker.getCachedConnection(CatalogTracker.java:569)
	at org.apache.hadoop.hbase.catalog.CatalogTracker.getRootServerConnection(CatalogTracker.java:369)
	at org.apache.hadoop.hbase.catalog.CatalogTracker.waitForRootServerConnection(CatalogTracker.java:353)
	at org.apache.hadoop.hbase.catalog.CatalogTracker.verifyRootRegionLocation(CatalogTracker.java:660)
	at org.apache.hadoop.hbase.master.HMaster.assignRootAndMeta(HMaster.java:616)
	at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:540)
	at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:363)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.net.ConnectException: Connection refused
	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:567)
	at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
	at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:488)
	at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupConnection(HBaseClient.java:328)
	at org.apache.hadoop.hbase.ipc.HBaseClient$Connection.setupIOstreams(HBaseClient.java:362)
	... 20 more
2012-04-09 10:42:24,336 INFO org.apache.hadoop.hbase.master.HMaster: Aborting
2012-04-09 10:42:24,336 DEBUG org.apache.hadoop.hbase.master.HMaster: Stopping service threads

Issue Links

• is related to: HBASE-4288 "Server not running" exception during meta verification causes RS abort
• is related to: HBASE-4470 ServerNotRunningException coming out of assignRootAndMeta kills the Master
• is related to: HBASE-4762 ROOT and META region never be assigned if IOE throws in verifyRootRegionLocation