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https://issues.apache.org/jira/browse/HDFS-6520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15222114#comment-15222114
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John Zhuge commented on HDFS-6520:
----------------------------------
In this test case, {{echo CORRUPT >/path/to/block}} is used to corrupt the
block.
> hdfs fsck -move not working
> ---------------------------
>
> Key: HDFS-6520
> URL: https://issues.apache.org/jira/browse/HDFS-6520
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: Shengjun Xin
> Assignee: John Zhuge
>
> I met some error when I run fsck -move.
> My steps are as the following:
> 1. Set up a pseudo cluster
> 2. Copy a file to hdfs
> 3. Corrupt a block of the file
> 4. Run fsck to check:
> {code}
> Connecting to namenode via http://localhost:50070
> FSCK started by hadoop (auth:SIMPLE) from /127.0.0.1 for path /user/hadoop at
> Wed Jun 11 15:58:38 CST 2014
> .
> /user/hadoop/fsck-test: CORRUPT blockpool
> BP-654596295-10.37.7.84-1402466764642 block blk_1073741825
> /user/hadoop/fsck-test: MISSING 1 blocks of total size 1048576 B.Status:
> CORRUPT
> Total size: 4104304 B
> Total dirs: 1
> Total files: 1
> Total symlinks: 0
> Total blocks (validated): 4 (avg. block size 1026076 B)
> ********************************
> CORRUPT FILES: 1
> MISSING BLOCKS: 1
> MISSING SIZE: 1048576 B
> CORRUPT BLOCKS: 1
> ********************************
> Minimally replicated blocks: 3 (75.0 %)
> Over-replicated blocks: 0 (0.0 %)
> Under-replicated blocks: 0 (0.0 %)
> Mis-replicated blocks: 0 (0.0 %)
> Default replication factor: 1
> Average block replication: 0.75
> Corrupt blocks: 1
> Missing replicas: 0 (0.0 %)
> Number of data-nodes: 1
> Number of racks: 1
> FSCK ended at Wed Jun 11 15:58:38 CST 2014 in 1 milliseconds
> The filesystem under path '/user/hadoop' is CORRUPT
> {code}
> 5. Run fsck -move to move the corrupted file to /lost+found and the error
> message in the namenode log:
> {code}
> 2014-06-11 15:48:16,686 INFO org.apache.hadoop.hdfs.server.namenode.NameNode:
> FSCK started by hadoop (auth:SIMPLE) from /127.0.0.1 for path /user/hadoop at
> Wed Jun 11 15:48:16 CST 2014
> 2014-06-11 15:48:16,894 INFO
> org.apache.hadoop.hdfs.server.namenode.FSEditLog: Number of transactions: 35
> Total time for transactions(ms): 9 Number of transactions batched in Syncs: 0
> Number of syncs: 25 SyncTimes(ms): 73
> 2014-06-11 15:48:16,991 ERROR
> org.apache.hadoop.hdfs.server.namenode.NameNode: Error reading block
> java.io.IOException: Expected empty end-of-read packet! Header: PacketHeader
> with packetLen=66048 header data: offsetInBlock: 65536
> seqno: 1
> lastPacketInBlock: false
> dataLen: 65536
> at
> org.apache.hadoop.hdfs.RemoteBlockReader2.readTrailingEmptyPacket(RemoteBlockReader2.java:259)
> at
> org.apache.hadoop.hdfs.RemoteBlockReader2.readNextPacket(RemoteBlockReader2.java:220)
> at
> org.apache.hadoop.hdfs.RemoteBlockReader2.read(RemoteBlockReader2.java:138)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.copyBlock(NamenodeFsck.java:649)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.copyBlocksToLostFound(NamenodeFsck.java:543)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.check(NamenodeFsck.java:460)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.check(NamenodeFsck.java:324)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.fsck(NamenodeFsck.java:233)
> at
> org.apache.hadoop.hdfs.server.namenode.FsckServlet$1.run(FsckServlet.java:67)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
> at
> org.apache.hadoop.hdfs.server.namenode.FsckServlet.doGet(FsckServlet.java:58)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> at
> org.apache.hadoop.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1192)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
> at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
> at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> 2014-06-11 15:48:16,992 ERROR
> org.apache.hadoop.hdfs.server.namenode.NameNode: Fsck: could not copy block
> BP-654596295-10.37.7.84-1402466764642:blk_1073741825_1001 to
> /lost+found/user/hadoop/fsck-test
> java.lang.Exception: Could not copy block data for
> BP-654596295-10.37.7.84-1402466764642:blk_1073741825_1001
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.copyBlock(NamenodeFsck.java:664)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.copyBlocksToLostFound(NamenodeFsck.java:543)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.check(NamenodeFsck.java:460)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.check(NamenodeFsck.java:324)
> at
> org.apache.hadoop.hdfs.server.namenode.NamenodeFsck.fsck(NamenodeFsck.java:233)
> at
> org.apache.hadoop.hdfs.server.namenode.FsckServlet$1.run(FsckServlet.java:67)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1548)
> at
> org.apache.hadoop.hdfs.server.namenode.FsckServlet.doGet(FsckServlet.java:58)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at
> org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1221)
> at
> org.apache.hadoop.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1192)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1212)
> at
> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:399)
> at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at
> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
> at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:766)
> at
> org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:450)
> at
> org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> at
> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> at org.mortbay.jetty.Server.handle(Server.java:326)
> at
> org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
> at
> org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
> at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> 2014-06-11 15:48:16,994 INFO org.apache.hadoop.hdfs.StateChange: DIR*
> completeFile: /lost+found/user/hadoop/fsck-test/0 is closed by
> DFSClient_NONMAPREDUCE_-774755866_14
> {code}
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