Critical Description
There are around 20 unit tests (out of around 2000) fail intermittently after TEZ-2333. Here is a stack:
org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find output/attempt_1429899954360_0001_1_01_000000_1_10003/file.out.index in any of the configured local directories
at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathToRead(LocalDirAllocator.java:449)
at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathToRead(LocalDirAllocator.java:164)
at org.apache.tez.runtime.library.common.shuffle.Fetcher.getShuffleInputFileName(Fetcher.java:611)
at org.apache.tez.runtime.library.common.shuffle.Fetcher.getTezIndexRecord(Fetcher.java:591)
at org.apache.tez.runtime.library.common.shuffle.Fetcher.doLocalDiskFetch(Fetcher.java:536)
at org.apache.tez.runtime.library.common.shuffle.Fetcher.setupLocalDiskFetch(Fetcher.java:517)
at org.apache.tez.runtime.library.common.shuffle.Fetcher.callInternal(Fetcher.java:190)
at org.apache.tez.runtime.library.common.shuffle.Fetcher.callInternal(Fetcher.java:72)
at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
To reproduce that in Pig test, using the following commands:
svn co http://svn.apache.org/repos/asf/pig/trunk
ant -Dhadoopversion=23 -Dtest.exec.type=tez -Dtestcase=TestTezAutoParallelism test
Note in Pig codebase, we already set TEZ_RUNTIME_OPTIMIZE_LOCAL_FETCH to "true" (http://svn.apache.org/viewvc/pig/trunk/src/org/apache/pig/backend/hadoop/executionengine/tez/TezLauncher.java?view=markup). I tried changing TEZ_RUNTIME_OPTIMIZE_LOCAL_FETCH to "false" in Pig and does not help.