suja s created HDFS-3443:
----------------------------
Summary: Unable to catch up edits during standby to active switch
due to NPE
Key: HDFS-3443
URL: https://issues.apache.org/jira/browse/HDFS-3443
Project: Hadoop HDFS
Issue Type: Sub-task
Components: auto-failover
Reporter: suja s
Start NN
Let NN standby services be started.
Before the editLogTailer is initialised start ZKFC and allow the activeservices
start to proceed further.
Here editLogTailer.catchupDuringFailover() will throw NPE.
void startActiveServices() throws IOException {
LOG.info("Starting services required for active state");
writeLock();
try {
FSEditLog editLog = dir.fsImage.getEditLog();
if (!editLog.isOpenForWrite()) {
// During startup, we're already open for write during initialization.
editLog.initJournalsForWrite();
// May need to recover
editLog.recoverUnclosedStreams();
LOG.info("Catching up to latest edits from old active before " +
"taking over writer role in edits logs.");
editLogTailer.catchupDuringFailover();
{noformat}
2012-05-18 16:51:27,585 WARN org.apache.hadoop.ipc.Server: IPC Server
Responder, call org.apache.hadoop.ha.HAServiceProtocol.getServiceStatus from
XX.XX.XX.55:58003: output error
2012-05-18 16:51:27,586 WARN org.apache.hadoop.ipc.Server: IPC Server handler 8
on 8020, call org.apache.hadoop.ha.HAServiceProtocol.transitionToActive from
XX.XX.XX.55:58004: error: java.lang.NullPointerException
java.lang.NullPointerException
at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startActiveServices(FSNamesystem.java:602)
at
org.apache.hadoop.hdfs.server.namenode.NameNode$NameNodeHAContext.startActiveServices(NameNode.java:1287)
at
org.apache.hadoop.hdfs.server.namenode.ha.ActiveState.enterState(ActiveState.java:61)
at
org.apache.hadoop.hdfs.server.namenode.ha.HAState.setStateInternal(HAState.java:63)
at
org.apache.hadoop.hdfs.server.namenode.ha.StandbyState.setState(StandbyState.java:49)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.transitionToActive(NameNode.java:1219)
at
org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.transitionToActive(NameNodeRpcServer.java:978)
at
org.apache.hadoop.ha.protocolPB.HAServiceProtocolServerSideTranslatorPB.transitionToActive(HAServiceProtocolServerSideTranslatorPB.java:107)
at
org.apache.hadoop.ha.proto.HAServiceProtocolProtos$HAServiceProtocolService$2.callBlockingMethod(HAServiceProtocolProtos.java:3633)
at
org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:427)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:916)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1692)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1688)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1232)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1686)
2012-05-18 16:51:27,586 INFO org.apache.hadoop.ipc.Server: IPC Server handler 9
on 8020 caught an exception
java.nio.channels.ClosedChannelException
at
sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:133)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:324)
at org.apache.hadoop.ipc.Server.channelWrite(Server.java:2092)
at org.apache.hadoop.ipc.Server.access$2000(Server.java:107)
at
org.apache.hadoop.ipc.Server$Responder.processResponse(Server.java:930)
at org.apache.hadoop.ipc.Server$Responder.doRespond(Server.java:994)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1738)
{noformat}
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