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  1. Hadoop HDFS
  2. HDFS-14581

Appending to EC files crashes NameNode

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Details

    • Bug
    • Status: Resolved
    • Critical
    • Resolution: Fixed
    • 3.3.0
    • 3.3.0
    • erasure-coding
    • None

    Description

      org.apache.hadoop.hdfs.server.namenode.FSDirAppendOp.prepareFileForAppend(..)@189

      file.recordModification(iip.getLatestSnapshotId());
      file.toUnderConstruction(leaseHolder, clientMachine);
      
      fsn.getLeaseManager().addLease(
      file.getFileUnderConstructionFeature().getClientName(), file.getId());
      
      LocatedBlock ret = null;
      if (!newBlock) {
      if (file.isStriped()) {
      throw new UnsupportedOperationException(
      "Append on EC file without new block is not supported.");
      }

      In this code "UnsupportedOperationException" exception thows after marking file underConstruction. In this case file is opened without any "Open" editlogs, after some time lease manager close this file and add close edit log.

      When SBN tail this edit log, it will fail with this exception.

      2019-06-13 19:17:51,513 ERROR org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader: Encountered exception on operation CloseOp [length=0, inodeId=0, path=/ECtest/********, replication=1, mtime=1560261947480, atime=1560258249117, blockSize=134217728, blocks=[blk_-9223372036854775792_1005], permissions=root:hadoop:rw-r--r--, aclEntries=null, clientName=, clientMachine=, overwrite=false, storagePolicyId=0, erasureCodingPolicyId=0, opCode=OP_CLOSE, txid=1363]
      java.io.IOException: File is not under construction: /ECtest/container-executor
      at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.applyEditLogOp(FSEditLogLoader.java:504)
      at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:286)
      at org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadFSEdits(FSEditLogLoader.java:181)
      at org.apache.hadoop.hdfs.server.namenode.FSImage.loadEdits(FSImage.java:924)
      at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer.doTailEdits(EditLogTailer.java:329)
      at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.doWork(EditLogTailer.java:460)
      at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.access$300(EditLogTailer.java:410)
      at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread$1.run(EditLogTailer.java:427)
      at org.apache.hadoop.security.SecurityUtil.doAsLoginUserOrFatal(SecurityUtil.java:485)
      at org.apache.hadoop.hdfs.server.namenode.ha.EditLogTailer$EditLogTailerThread.run(EditLogTailer.java:423)
      

      Attachments

        1. HDFS-14581.001.patch
          4 kB
          Surendra Singh Lilhore
        2. HDFS-14581.002.patch
          4 kB
          Surendra Singh Lilhore

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              surendralilhore Surendra Singh Lilhore
              surendralilhore Surendra Singh Lilhore
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                Created:
                Updated:
                Resolved: