[HADOOP-17142] Fix outdated properties of journal node when perform rollback

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 3.2.2, 3.3.1, 3.4.0
• Assignee: Deegue
• Reporter: Deegue
• Created: 21/Jul/20 06:38
• Updated: 12/Feb/24 07:04
• Resolved: 17/May/21 02:56

Description

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:

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)

Issue Links

• is related to: HDFS-15485 Fix outdated properties of JournalNode when performing rollback
• links to: https://github.com/apache/hadoop/pull/2162