[
https://issues.apache.org/jira/browse/AMBARI-9163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Alejandro Fernandez updated AMBARI-9163:
----------------------------------------
Attachment: AMBARI-9163.patch
> Intermittent Preparing NAMENODE fails during RU due to JOURNALNODE quorum not
> established
> -----------------------------------------------------------------------------------------
>
> Key: AMBARI-9163
> URL: https://issues.apache.org/jira/browse/AMBARI-9163
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.0.0
> Reporter: Alejandro Fernandez
> Assignee: Alejandro Fernandez
> Priority: Blocker
> Fix For: 2.0.0
>
> Attachments: AMBARI-9163.patch
>
>
> The active namenode shutdowns during the first call to get the safemode
> status.
> {code}
> su - hdfs -c 'hdfs dfsadmin -safemode get'
> {code}
> returned
> {code}
> failed on connection exception: java.net.ConnectException: Connection
> refused; For more details see:
> http://wiki.apache.org/hadoop/ConnectionRefused
> {code}
> The active namenode shows the following during the same time window,
> {code}
> 2015-01-15 00:35:04,233 WARN client.QuorumJournalManager
> (IPCLoggerChannel.java:call(388)) - Remote journal 192.168.64.106:8485 failed
> to write txns 52-52. Will try to write to this JN again after the next log
> roll.
> org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hdfs.qjournal.protocol.JournalOutOfSyncException):
> Can't write, no segment open
> at
> org.apache.hadoop.hdfs.qjournal.server.Journal.checkSync(Journal.java:470)
> at
> org.apache.hadoop.hdfs.qjournal.server.Journal.journal(Journal.java:344)
> at
> org.apache.hadoop.hdfs.qjournal.server.JournalNodeRpcServer.journal(JournalNodeRpcServer.java:148)
> at
> org.apache.hadoop.hdfs.qjournal.protocolPB.QJournalProtocolServerSideTranslatorPB.journal(QJournalProtocolServerSideTranslatorPB.java:158)
> at
> org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos$QJournalProtocolService$2.callBlockingMethod(QJournalProtocolProtos.java:25421)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:619)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:962)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2039)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2035)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2033)
> at org.apache.hadoop.ipc.Client.call(Client.java:1468)
> at org.apache.hadoop.ipc.Client.call(Client.java:1399)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
> at com.sun.proxy.$Proxy12.journal(Unknown Source)
> at
> org.apache.hadoop.hdfs.qjournal.protocolPB.QJournalProtocolTranslatorPB.journal(QJournalProtocolTranslatorPB.java:167)
> at
> org.apache.hadoop.hdfs.qjournal.client.IPCLoggerChannel$7.call(IPCLoggerChannel.java:385)
> at
> org.apache.hadoop.hdfs.qjournal.client.IPCLoggerChannel$7.call(IPCLoggerChannel.java:378)
> at java.util.concurrent.FutureTask.run(FutureTask.java:262)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> This issue is intermittent because it depends on the behavior of the
> Journalnodes, so this will require more work to the scripts.
> Today, our orchestration restarts one Journalnode at a time. However, the
> current log segment is null because it has not yet rolled to a new one, which
> can be forced by the command "hdfs dfsadmin -rollEdit" and waiting til some
> conditions are true.
> The runbook has more details,
> {code}
> // Function to ensure all JNs are up and are functional
> ensureJNsAreUp(Jn1, Jn2, Jn3) {
> rollEdits at the namenode // hdfs dfsadmin -rollEdit
> get “LastAppliedOrWrittenTxId” from NN jmx
> wait till "LastWrittenTxId" from all JNs is >= previous step transaction
> ID, timeout after 3 mins
> }
> // Before bringing down a journal node ensure that the other two journal
> nodes are up
> ensureJNsAreUp
> for each JN {
> do upgrade of one JN
> ensureJNsAreUp
> }
> {code}
> Root caused to:
> https://github.com/apache/hadoop/blob/ae91b13a4b1896b893268253104f935c3078d345/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/qjournal/server/Journal.java
> line 344
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
