hadoop dfs command line doesn't exit with status code on error
--------------------------------------------------------------
Key: HADOOP-554
URL: http://issues.apache.org/jira/browse/HADOOP-554
Project: Hadoop
Issue Type: Bug
Components: dfs
Reporter: Marco Nicosia
In DFSClient, the code looks like:
---- >8 ----
int exitCode = -1;
...
try {
if ("-put".equals(cmd) || "-copyFromLocal".equals(cmd)) {
copyFromLocal(new Path(argv[i++]), argv[i++]);
...
exitCode = 0;;
} catch (IOException e ) {
System.err.println( cmd.substring(1) + ": " + e.getLocalizedMessage()
);
} finally {
fs.close();
}
return exitCode;
---- 8< ----
Point 1: Few, if any of the functions called throw an exception. Instead they
System.err.println and return.
Point 2: exitCode, regardless if there is an exception, is always 0.
At minimum, it would be best if SOME status code were returned, so that any
scripts calling hadoop dfs would know to parse the output.
At best, there'd be a well-documented table of exit codes so that parsing
stderr wouldn't be required.
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