[jira] [Created] (HDFS-1989) When checkpointing by backup node occurs parallely when a file is being closed by a client then Exception occurs saying no journal streams.

Tue, 24 May 2011 04:58:31 -0700 

When checkpointing by backup node occurs parallely when a file is being closed 
by a client then Exception occurs saying no journal streams. 
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                 Key: HDFS-1989
                 URL: https://issues.apache.org/jira/browse/HDFS-1989
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: name-node
    Affects Versions: 0.23.0
            Reporter: ramkrishna.s.vasudevan
             Fix For: 0.23.0


Backup namenode initiates the checkpointing process. 
As a part of checkpointing based on the timestamp it tries to download the 
FSImage or use the existing one.

Then it tries to save the FSImage.

During this time it tries to close the editLog streams.

Parallely when a client tries to close a file just after the checkpointing 
process closes the editLog Stream then we get an exception saying
java.io.IOException: java.lang.IllegalStateException: !!! WARNING !!! File 
system changes are not persistent. No journal streams.

Here the saveNameSpace api closes all the editlog streams resulting in this 
issue.



 


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