[HDFS-13596] NN restart fails after RollingUpgrade from 2.x to 3.x - ASF JIRA

Voters

Watch issue

Watchers

Create sub-task

Link

Clone

Update Comment Author

Replace String in Comment

Update Comment Visibility

Delete Comments

XML

Word

Printable

JSON

Details

Type: Bug
Status: Resolved
Priority: Blocker
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 3.3.0, 3.2.1, 3.1.3
Component/s: hdfs
Labels:
None

Target Version/s:

2.10.0, 3.2.0, 3.1.2, 3.3.0
Hadoop Flags:

Reviewed

Description

After rollingUpgrade NN from 2.x and 3.x, if the NN is restarted, it fails while replaying edit logs.

After NN is started with rollingUpgrade, the layoutVersion written to editLogs (before finalizing the upgrade) is the pre-upgrade layout version (so as to support downgrade).
When writing transactions to log, NN writes as per the current layout version. In 3.x, erasureCoding bits are added to the editLog transactions.
So any edit log written after the upgrade and before finalizing the upgrade will have the old layout version but the new format of 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 erasureCoding bits.
This cascades into reading the wrong set of bits for other fields and leads to NN shutting down.

Sample error output:

java.lang.IllegalArgumentException: Invalid clientId - length is 0 expected length 16
 at com.google.common.base.Preconditions.checkArgument(Preconditions.java:88)
 at org.apache.hadoop.ipc.RetryCache$CacheEntry.<init>(RetryCache.java:74)
 at org.apache.hadoop.ipc.RetryCache$CacheEntry.<init>(RetryCache.java:86)
 at org.apache.hadoop.ipc.RetryCache$CacheEntryWithPayload.<init>(RetryCache.java:163)
 at org.apache.hadoop.ipc.RetryCache.addCacheEntryWithPayload(RetryCache.java:322)
 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.addCacheEntryWithPayload(FSNamesystem.java:960)
 at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.applyEditLogOp(FSEditLogLoader.java:397)
 at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:249)
 at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:158)
 at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:888)
 at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:745)
 at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:323)
 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1086)
 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:714)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:632)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:694)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:937)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:910)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1643)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1710)
2018-05-17 19:10:06,522 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Encountered exception loading fsimage
java.io.IOException: java.lang.IllegalStateException: Cannot skip to less than the current value (=16389), where newValue=16388
 at org.apache.hadoop.hdfs.server.namenode.FSDirectory.resetLastInodeId(FSDirectory.java:1945)
 at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:298)
 at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:158)
 at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:888)
 at org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:745)
 at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:323)
 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1086)
 at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:714)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:632)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:694)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:937)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:910)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1643)
 at org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1710)
Caused by: java.lang.IllegalStateException: Cannot skip to less than the current value (=16389), where newValue=16388
 at org.apache.hadoop.util.SequentialNumber.skipTo(SequentialNumber.java:58)
 at org.apache.hadoop.hdfs.server.namenode.FSDirectory.resetLastInodeId(FSDirectory.java:1943)