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From "Uma Maheswara Rao G (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2271) startJournalSpool should invoke ProcessIOError with failed storage directories if createEditLogFile throws any exception.
Date Thu, 18 Aug 2011 18:46:28 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2271?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Uma Maheswara Rao G updated HDFS-2271:
--------------------------------------

    Description: 
Even If createEditsLogFile failes in startJournalSpool of BackUpStorage, BackUPNode will proceed
with exceptions. 


  was:
If createEditsLogFile failes in startJournalSpool of BackUpStorage, BackUPNode will proceed
with following exceptions. 


2011-04-09 21:24:43,892 ERROR namenode.FSNamesystem (FSEditLog.java:logSync(1207)) - Unable
to sync edit log.
org.apache.hadoop.ipc.RemoteException: java.io.FileNotFoundException: /hdfsdata/7/patch/name/data/current/edits
(No such file or directory)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog$EditLogFileOutputStream.<init>(FSEditLog.java:150)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.createEditLogFile(FSEditLog.java:427)
at org.apache.hadoop.hdfs.server.namenode.BackupStorage.startJournalSpool(BackupStorage.java:275)
at org.apache.hadoop.hdfs.server.namenode.BackupNode.journal(BackupNode.java:327)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:541)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1105)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1101)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1099)

at org.apache.hadoop.ipc.Client.call(Client.java:953)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:239)
at $Proxy4.journal(Unknown Source)
at org.apache.hadoop.hdfs.server.namenode.EditLogBackupOutputStream.send(EditLogBackupOutputStream.java:165)
at org.apache.hadoop.hdfs.server.namenode.EditLogBackupOutputStream.flushAndSync(EditLogBackupOutputStream.java:145)
at org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream.flush(EditLogOutputStream.java:83)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.logSync(FSEditLog.java:1204)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startCheckpoint(FSNamesystem.java:5164)
at org.apache.hadoop.hdfs.server.namenode.NameNode.startCheckpoint(NameNode.java:547)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:541)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1105)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1101)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1099)
2011-04-09 21:24:43,893 ERROR namenode.FSNamesystem (FSEditLog.java:processIOError(557)) -
Unable to log edits to 10.18.53.203:50100
2011-04-09 21:24:44,353 WARN mortbay.log (Slf4jLog.java:warn(76)) - /getimage: java.io.IOException:
GetImage failed. java.io.IOException: Inconsistent checkpoint fields.
LV = -18 namespaceID = 2007855034 cTime = 0; checkpointTime = 1302380284708.
Expecting respectively: -18; 2007855034; 0; 1302380284709
at org.apache.hadoop.hdfs.server.namenode.CheckpointSignature.validateStorageInfo(CheckpointSignature.java:70)
at org.apache.hadoop.hdfs.server.namenode.FSImage.validateCheckpointUpload(FSImage.java:1732)
at org.apache.hadoop.hdfs.server.namenode.GetImageServlet.doGet(GetImageServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

Solution:
When it failes to createEditLogFile, we can collect all the failed directories and can call
processIOError with that storageDirectories list

{code}
synchronized void startJournalSpool(NamenodeRegistration nnReg)
 throws IOException {
..................
...................

 ArrayList<StorageDirectory> errorSDs = new ArrayList<StorageDirectory>();
    // create journal spool directories
    for(Iterator<StorageDirectory> it =
                          dirIterator(NameNodeDirType.EDITS); it.hasNext();) {
      ...................
     ...................     
      // create edit file if missing
      File eFile = getEditFile(sd);
      if(!eFile.exists())
      {
    	  try
    	  {
    		  editLog.createEditLogFile(eFile);
    	  }
    	  catch(IOException ie)
    	  {
            LOG.error("Unable to save edits for " + sd.getRoot(), ie);
            errorSDs.add(sd);
          }
      }
    }
    processIOError(errorSDs, true);

{code}


Following is the trace.

2011-04-09 21:24:43,892 ERROR namenode.FSNamesystem (FSEditLog.java:logSync(1207)) - Unable
to sync edit log.
org.apache.hadoop.ipc.RemoteException: java.io.FileNotFoundException: /hdfsdata/7/patch/name/data/current/edits
(No such file or directory)
at java.io.RandomAccessFile.open(Native Method)
at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog$EditLogFileOutputStream.<init>(FSEditLog.java:150)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.createEditLogFile(FSEditLog.java:427)
at org.apache.hadoop.hdfs.server.namenode.BackupStorage.startJournalSpool(BackupStorage.java:275)
at org.apache.hadoop.hdfs.server.namenode.BackupNode.journal(BackupNode.java:327)
at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:541)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1105)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1101)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1099)

at org.apache.hadoop.ipc.Client.call(Client.java:953)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:239)
at $Proxy4.journal(Unknown Source)
at org.apache.hadoop.hdfs.server.namenode.EditLogBackupOutputStream.send(EditLogBackupOutputStream.java:165)
at org.apache.hadoop.hdfs.server.namenode.EditLogBackupOutputStream.flushAndSync(EditLogBackupOutputStream.java:145)
at org.apache.hadoop.hdfs.server.namenode.EditLogOutputStream.flush(EditLogOutputStream.java:83)
at org.apache.hadoop.hdfs.server.namenode.FSEditLog.logSync(FSEditLog.java:1204)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startCheckpoint(FSNamesystem.java:5164)
at org.apache.hadoop.hdfs.server.namenode.NameNode.startCheckpoint(NameNode.java:547)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:541)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1105)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1101)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1099)
2011-04-09 21:24:43,893 ERROR namenode.FSNamesystem (FSEditLog.java:processIOError(557)) -
Unable to log edits to 10.18.53.203:50100
2011-04-09 21:24:44,353 WARN mortbay.log (Slf4jLog.java:warn(76)) - /getimage: java.io.IOException:
GetImage failed. java.io.IOException: Inconsistent checkpoint fields.
LV = -18 namespaceID = 2007855034 cTime = 0; checkpointTime = 1302380284708.
Expecting respectively: -18; 2007855034; 0; 1302380284709
at org.apache.hadoop.hdfs.server.namenode.CheckpointSignature.validateStorageInfo(CheckpointSignature.java:70)
at org.apache.hadoop.hdfs.server.namenode.FSImage.validateCheckpointUpload(FSImage.java:1732)
at org.apache.hadoop.hdfs.server.namenode.GetImageServlet.doGet(GetImageServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

*Solution can be:*
When it failes to createEditLogFile, we can collect all the failed directories and can call
processIOError with that storageDirectories list

{code}
synchronized void startJournalSpool(NamenodeRegistration nnReg)
 throws IOException {
..................
...................

 ArrayList<StorageDirectory> errorSDs = new ArrayList<StorageDirectory>();
    // create journal spool directories
    for(Iterator<StorageDirectory> it =
                          dirIterator(NameNodeDirType.EDITS); it.hasNext();) {
      ...................
     ...................     
      // create edit file if missing
      File eFile = getEditFile(sd);
      if(!eFile.exists())
      {
    	  try
    	  {
    		  editLog.createEditLogFile(eFile);
    	  }
    	  catch(IOException ie)
    	  {
            LOG.error("Unable to save edits for " + sd.getRoot(), ie);
            errorSDs.add(sd);
          }
      }
    }
    processIOError(errorSDs, true);

{code}

> startJournalSpool should invoke ProcessIOError with failed storage directories if createEditLogFile
throws any exception.  
> ---------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HDFS-2271
>                 URL: https://issues.apache.org/jira/browse/HDFS-2271
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.22.0
>            Reporter: Uma Maheswara Rao G
>            Assignee: Uma Maheswara Rao G
>
> Even If createEditsLogFile failes in startJournalSpool of BackUpStorage, BackUPNode will
proceed with exceptions. 

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