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https://issues.apache.org/jira/browse/HADOOP-17142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17345862#comment-17345862
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Wei-Chiu Chuang commented on HADOOP-17142:
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Found it: HDFS-15485
> Fix outdated properties of journal node when perform rollback
> -------------------------------------------------------------
>
> Key: HADOOP-17142
> URL: https://issues.apache.org/jira/browse/HADOOP-17142
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Deegue
> Priority: Minor
> Fix For: 3.2.2, 3.3.1, 3.4.0
>
>
> When rollback HDFS cluster, properties in JNStorage won't be refreshed after
> the storage dir changed. It leads to exceptions when starting namenode.
> The exception like:
> {code:java}
> 2020-07-09 19:04:12,810 FATAL [IPC Server handler 105 on 8022]
> org.apache.hadoop.hdfs.server.namenode.FSEditLog: Error:
> recoverUnfinalizedSegments failed for required journal
> (JournalAndStream(mgr=QJM to [10.0.118.217:8485, 10.0.117.208:8485,
> 10.0.118.179:8485], stream=null))
> org.apache.hadoop.hdfs.qjournal.client.QuorumException: Got too many
> exceptions to achieve quorum size 2/3. 3 exceptions thrown:
> 10.0.118.217:8485: Incompatible namespaceID for journal Storage Directory
> /mnt/vdc-11176G-0/dfs/jn/nameservicetest1: NameNode has nsId 647617129 but
> storage has nsId 0
> at
> org.apache.hadoop.hdfs.qjournal.server.JNStorage.checkConsistentNamespace(JNStorage.java:236)
> at
> org.apache.hadoop.hdfs.qjournal.server.Journal.newEpoch(Journal.java:300)
> at
> org.apache.hadoop.hdfs.qjournal.server.JournalNodeRpcServer.newEpoch(JournalNodeRpcServer.java:136)
> at
> org.apache.hadoop.hdfs.qjournal.protocolPB.QJournalProtocolServerSideTranslatorPB.newEpoch(QJournalProtocolServerSideTranslatorPB.java:133)
> at
> org.apache.hadoop.hdfs.qjournal.protocol.QJournalProtocolProtos$QJournalProtocolService$2.callBlockingMethod(QJournalProtocolProtos.java:25417)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:617)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1073)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2278)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2274)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1924)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2274)
> {code}
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