Ted Yu created HADOOP-13489:
-------------------------------
Summary: DistCp may incorrectly return success status when the
underlying Job failed
Key: HADOOP-13489
URL: https://issues.apache.org/jira/browse/HADOOP-13489
Project: Hadoop Common
Issue Type: Bug
Reporter: Ted Yu
I was troubleshooting HBASE-14450 where at the end of BackupdistCp#execute(),
distcp job was marked unsuccessful (BackupdistCp is a wrapper of DistCp).
Yet in IncrementalTableBackupProcedure#incrementalCopy(), the return value from
copyService.copy() was 0.
Here is related code from DistCp:
{code}
try {
execute();
} catch (InvalidInputException e) {
LOG.error("Invalid input: ", e);
return DistCpConstants.INVALID_ARGUMENT;
} catch (DuplicateFileException e) {
LOG.error("Duplicate files in input path: ", e);
return DistCpConstants.DUPLICATE_INPUT;
} catch (AclsNotSupportedException e) {
LOG.error("ACLs not supported on at least one file system: ", e);
return DistCpConstants.ACLS_NOT_SUPPORTED;
} catch (XAttrsNotSupportedException e) {
LOG.error("XAttrs not supported on at least one file system: ", e);
return DistCpConstants.XATTRS_NOT_SUPPORTED;
} catch (Exception e) {
LOG.error("Exception encountered ", e);
return DistCpConstants.UNKNOWN_ERROR;
}
return DistCpConstants.SUCCESS;
{code}
We don't check whether the Job returned by execute() was successful.
Even if the Job fails, DistCpConstants.SUCCESS is returned.
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