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https://issues.apache.org/jira/browse/HDFS-14396?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16913984#comment-16913984
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Hudson commented on HDFS-14396:
-------------------------------
FAILURE: Integrated in Jenkins build Hadoop-trunk-Commit #17173 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/17173/])
HDFS-14396. Failed to load image from FSImageFile when downgrade from
(aajisaka: rev bd7baea5a5d4ff351645e34c0ef09b7ba82f4285)
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSImageFormatProtobuf.java
> Failed to load image from FSImageFile when downgrade from 3.x to 2.x
> --------------------------------------------------------------------
>
> Key: HDFS-14396
> URL: https://issues.apache.org/jira/browse/HDFS-14396
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Fei Hui
> Assignee: Fei Hui
> Priority: Major
> Fix For: 3.3.0, 3.2.1, 3.1.3
>
> Attachments: HDFS-14396.001.patch, HDFS-14396.002.patch
>
>
> After fixing HDFS-13596, try to downgrade from 3.x to 2.x. But namenode can't
> start because exception occurs. The message follows
> {code:java}
> 2019-01-23 17:22:18,730 ERROR org.apache.hadoop.hdfs.server.namenode.FSImage:
> Failed to load image from
> FSImageFile(file=/data1/hadoopdata/hadoop-namenode/current/fsimage_0000000000000025310,
> cpktTxId=0000000000
> 000025310)
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader.loadInternal(FSImageFormatProtobuf.java:243)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormatProtobuf$Loader.load(FSImageFormatProtobuf.java:179)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImageFormat$LoaderDelegator.load(FSImageFormat.java:226)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:885)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:869)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImageFile(FSImage.java:742)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:673)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:290)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:998)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:700)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:612)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:672)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:839)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:823)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1517)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1583)
> 2019-01-23 17:22:19,023 WARN
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Encountered exception
> loading fsimage
> java.io.IOException: Failed to load FSImage file, see error(s) above for more
> info.
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.loadFSImage(FSImage.java:688)
> at
> org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:290)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:998)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:700)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:612)
> {code}
> This issue occurs because 3.x namenode saves image with EC fields during
> upgrade
> Try to fix it
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