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From "Paul Yang (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1712) HAR sequence files throw errors in MR jobs
Date Sat, 17 Apr 2010 00:51:25 GMT
HAR sequence files throw errors in MR jobs
------------------------------------------

                 Key: MAPREDUCE-1712
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1712
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: harchive
    Affects Versions: 0.20.1
            Reporter: Paul Yang


When a HAR is specified as the input for a map reduce job and the file format is sequence
file, an error similar to the following is thrown (this one is from Hive).

{code}
java.lang.IllegalArgumentException: Offset 0 is outside of file (0..-1)
        at org.apache.hadoop.mapred.FileInputFormat.getBlockIndex(FileInputFormat.java:299)
        at org.apache.hadoop.mapred.FileInputFormat.getSplitHosts(FileInputFormat.java:455)
        at org.apache.hadoop.mapred.FileInputFormat.getSplits(FileInputFormat.java:260)
        at org.apache.hadoop.hive.ql.io.HiveInputFormat.getSplits(HiveInputFormat.java:261)
        at org.apache.hadoop.mapred.JobClient.writeOldSplits(JobClient.java:827)
        at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:798)
        at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:747)
        at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:663)
        at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:107)
        at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:55)
        at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:631)
        at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:504)
        at org.apache.hadoop.hive.ql.Driver.run(Driver.java:382)
        at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:138)
        at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:197)
        at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:303)
        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.util.RunJar.main(RunJar.java:156)
{code}

This is caused by the dummy block location returned by HarFileSystem.getFileBlockLocations().

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