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Date: Mon, 7 Nov 2011 05:22:51 +0000 (UTC)
From: "Ted Yu (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (HBASE-4754) FSTableDescriptors.getTableInfoPath()
 should be able to handle FileNotFoundException
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     [ https://issues.apache.org/jira/browse/HBASE-4754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Yu updated HBASE-4754:
--------------------------

    Status: Patch Available  (was: Open)
    
> FSTableDescriptors.getTableInfoPath() should be able to handle FileNotFoundException
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-4754
>                 URL: https://issues.apache.org/jira/browse/HBASE-4754
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 0.92.0
>
>         Attachments: 4754.txt
>
>
> As reported by Roman in the thread entitled 'HBase 0.92/Hadoop 0.22 test results', table creation would result in the following if hadoop 0.22 is the underlying platform:
> {code}
> 11/11/05 19:08:48 INFO handler.CreateTableHandler: Attemping to create
> the table b
> 11/11/05 19:08:48 ERROR handler.CreateTableHandler: Error trying to
> create the table b
> java.io.FileNotFoundException: File
> hdfs://ip-10-110-254-200.ec2.internal:17020/hbase/b does not exist.
>        at org.apache.hadoop.hdfs.DistributedFileSystem.listStatus(DistributedFileSystem.java:387)
>        at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1085)
>        at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1110)
>        at org.apache.hadoop.hbase.util.FSTableDescriptors.getTableInfoPath(FSTableDescriptors.java:257)
>        at org.apache.hadoop.hbase.util.FSTableDescriptors.getTableInfoPath(FSTableDescriptors.java:243)
>        at org.apache.hadoop.hbase.util.FSTableDescriptors.createTableDescriptor(FSTableDescriptors.java:566)
>        at org.apache.hadoop.hbase.util.FSTableDescriptors.createTableDescriptor(FSTableDescriptors.java:535)
>        at org.apache.hadoop.hbase.util.FSTableDescriptors.createTableDescriptor(FSTableDescriptors.java:519)
>        at org.apache.hadoop.hbase.master.handler.CreateTableHandler.handleCreateTable(CreateTableHandler.java:140)
>        at org.apache.hadoop.hbase.master.handler.CreateTableHandler.process(CreateTableHandler.java:126)
>        at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:168)
>        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>        at java.lang.Thread.run(Thread.java:619)
> {code}
> This was due to how DistributedFileSystem.listStatus() in 0.22 handles non-existent directory:
> {code}
>   @Override
>   public FileStatus[] listStatus(Path p) throws IOException {
>     String src = getPathName(p);
>     // fetch the first batch of entries in the directory
>     DirectoryListing thisListing = dfs.listPaths(
>         src, HdfsFileStatus.EMPTY_NAME);
>     if (thisListing == null) { // the directory does not exist
>       throw new FileNotFoundException("File " + p + " does not exist.");
>     }
> {code}
> So in FSTableDescriptors.getTableInfoPath(), we should catch FileNotFoundException and treat it the same way as status being null.

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