this patch adds tests for HADOOP-6097.

This looks good. Is it worth adding a comment in the test to say it's testing HARs containing files with "escape-worthy characters" in their names? (Minor nit: there's an error in the line assertTrue("Should read 6 bytes.", readBytes == 8);)

Also, are you planning on adding a test for the LineReader reset part of HADOOP-6097?

thanks tom....let me see if I can come up with a test case for the LineReader reset. I did forget adding a test case for that. I probably file that as part of this patch.

this patch adds one more tests on caching of har schema and fixes issues pointed to by Tom. This does not include the LineReader reset test case as I found out that it is very hard to reproduce. It requires that a lot of files hash to the same hash (which is really hard to reproduce).

wrong name for the patch file!

-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12422726/MAPREDUCE-1010.patch
against trunk revision 827854.

+1 @author. The patch does not contain any @author tags.

+1 tests included. The patch appears to include 3 new or modified tests.

+1 javadoc. The javadoc tool did not generate any warning messages.

+1 javac. The applied patch does not increase the total number of javac compiler warnings.

+1 findbugs. The patch does not introduce any new Findbugs warnings.

+1 release audit. The applied patch does not increase the total number of release audit warnings.

+1 core tests. The patch passed core unit tests.

-1 contrib tests. The patch failed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h3.grid.sp2.yahoo.net/85/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h3.grid.sp2.yahoo.net/85/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h3.grid.sp2.yahoo.net/85/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h3.grid.sp2.yahoo.net/85/console

This message is automatically generated.

If this is intended for 0.20, please generate a patch for that branch. Naively copying the patched unit test caused a NPE:

java.lang.NullPointerException
        at org.apache.hadoop.tools.HadoopArchives.run(HadoopArchives.java:662)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
        at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
        at org.apache.hadoop.tools.TestHarFileSystem.testArchivesWithMapred(TestHarFileSystem.java:192)

This was committed as a part of HADOOP-6097.