Cheolsoo Park created PIG-3046:
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Summary: An empty file name in -Dpig.additional.jars throws an
error
Key: PIG-3046
URL: https://issues.apache.org/jira/browse/PIG-3046
Project: Pig
Issue Type: Bug
Reporter: Cheolsoo Park
This issue was raised on the user mailing list. To reproduce it, please run the
following command in MR mode:
{code}
pig -Dpig.additional.jars=<jar1>::<jar2> <pig script>
{code}
As can be seen, I put {{::}} in the middle of {{-Dpig.additional.jars}}, and
this causes the following error:
{code}
Caused by: java.lang.IllegalArgumentException: Can not create a Path from
an empty string at org.apache.hadoop.fs.Path.checkPathArg(Path.java:82)
at org.apache.hadoop.fs.Path.<init>(Path.java:90)
at org.apache.hadoop.fs.Path.<init>(Path.java:45)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.shipToHDFS(JobControlCompiler.java:1455)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.putJarOnClassPathThroughDistributedCache(JobControlCompiler.java:1432)
at
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler.getJob(JobControlCompiler.java:508)
{code}
Although it's not too hard to see what's wrong, it's not always easy to track
down where an empty file name is from. In particular if various environment
variables are set in another start-up script, it's time-consuming to identify
the root cause.
In fact, Pig should just skip an empty file name instead attempts to convert it
to a path and throws an exception like this.
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