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https://issues.apache.org/jira/browse/HDFS-15566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17195155#comment-17195155
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Brahma Reddy Battula commented on HDFS-15566:
---------------------------------------------
[~weichiu] thanks for review..Uploaded the patch to fix the checkstyle and
handling writefields.
> NN restart fails after RollingUpgrade from 3.1.3/3.2.1 to 3.3.0
> ----------------------------------------------------------------
>
> Key: HDFS-15566
> URL: https://issues.apache.org/jira/browse/HDFS-15566
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
> Priority: Blocker
> Attachments: HDFS-15566-001.patch, HDFS-15566-002.patch
>
>
> * After rollingUpgrade NN from 3.1.3/3.2.1 to 3.3.0, if the NN is restarted,
> it fails while replaying edit logs.
> * HDFS-14922, HDFS-14924, and HDFS-15054 introduced the *modification time*
> bits to the editLog transactions.
> * When NN is restarted and the edit logs are replayed, the NN reads the old
> layout version from the editLog file. When parsing the transactions, it
> assumes that the transactions are also from the previous layout and hence
> skips parsing the *modification time* bits.
> * This cascades into reading the wrong set of bits for other fields and
> leads to NN shutting down.
> {noformat}
> 2020-09-07 19:34:42,085 | DEBUG | main | Stopping client | Client.java:1361
> 2020-09-07 19:34:42,087 | ERROR | main | Failed to start namenode. |
> NameNode.java:1751
> java.lang.IllegalArgumentException
> at com.google.common.base.Preconditions.checkArgument(Preconditions.java:72)
> at org.apache.hadoop.ipc.ClientId.toString(ClientId.java:56)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.appendRpcIdsToString(FSEditLogOp.java:318)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogOp.access$700(FSEditLogOp.java:153)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogOp$DeleteSnapshotOp.toString(FSEditLogOp.java:3606)
> at java.lang.String.valueOf(String.java:2994)
> at java.lang.StringBuilder.append(StringBuilder.java:131)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:305)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:188)
> at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:932)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:779)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:337)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1136)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:742)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:654)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:716)
> at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:959)
> at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:932)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1674)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1744){noformat}
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