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https://issues.apache.org/jira/browse/HBASE-5741?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhihong Yu updated HBASE-5741:
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Attachment: 5741-v3.txt
> ImportTsv does not check for table existence
> ---------------------------------------------
>
> Key: HBASE-5741
> URL: https://issues.apache.org/jira/browse/HBASE-5741
> Project: HBase
> Issue Type: Bug
> Components: mapreduce
> Affects Versions: 0.90.4
> Reporter: Clint Heath
> Assignee: Himanshu Vashishtha
> Fix For: 0.94.0, 0.96.0
>
> Attachments: 5741-94.txt, 5741-v3.txt, HBase-5741-v2.patch,
> HBase-5741.patch
>
>
> The usage statement for the "importtsv" command to hbase claims this:
> "Note: if you do not use this option, then the target table must already
> exist in HBase" (in reference to the "importtsv.bulk.output" command-line
> option)
> The truth is, the table must exist no matter what, importtsv cannot and will
> not create it for you.
> This is the case because the createSubmittableJob method of ImportTsv does
> not even attempt to check if the table exists already, much less create it:
> (From org.apache.hadoop.hbase.mapreduce.ImportTsv.java)
> 305 HTable table = new HTable(conf, tableName);
> The HTable method signature in use there assumes the table exists and runs a
> meta scan on it:
> (From org.apache.hadoop.hbase.client.HTable.java)
> 142 * Creates an object to access a HBase table.
> ...
> 151 public HTable(Configuration conf, final String tableName)
> What we should do inside of createSubmittableJob is something similar to what
> the "completebulkloads" command would do:
> (Taken from org.apache.hadoop.hbase.mapreduce.LoadIncrementalHFiles.java)
> 690 boolean tableExists = this.doesTableExist(tableName);
> 691 if (!tableExists) this.createTable(tableName,dirPath);
> Currently the docs are misleading, the table in fact must exist prior to
> running importtsv. We should check if it exists rather than assume it's
> already there and throw the below exception:
> 12/03/14 17:15:42 WARN client.HConnectionManager$HConnectionImplementation:
> Encountered problems when prefetch META table:
> org.apache.hadoop.hbase.TableNotFoundException: Cannot find row in .META. for
> table: myTable2, row=myTable2,,99999999999999
> at
> org.apache.hadoop.hbase.client.MetaScanner.metaScan(MetaScanner.java:150)
> ...
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