Philip Zeyliger has uploaded this change for review. ( http://gerrit.cloudera.org:8080/8405
Change subject: IMPALA-6108, IMPALA-6070: Parallel data load (re-instated). ...................................................................... IMPALA-6108, IMPALA-6070: Parallel data load (re-instated). This is a revert of a revert, re-enabling parallel data load. It avoid the race condition by explicitly configuring the temporary directory in question in load-data.py. When the parallel data load change went in, we discovered a race with a signature of: java.io.FileNotFoundException: File /tmp/hadoop-jenkins/mapred/local/1508958341829_tmp does not exist The number in this path is milliseconds since the epoch, and the race occurs when two queries submitted to HiveServer2, running with the local runner, hit the same millisecond time stamp. The upstream bug is https://issues.apache.org/jira/browse/MAPREDUCE-6441, and I described the symptoms in https://issues.apache.org/jira/browse/MAPREDUCE-6992 (which is now marked as a dupe). I've tested this by running data load 5 times on the same machines where it failed before. I also ran data load manually and inspected the system to make sure that the temporary directories are getting created as expected in /tmp/impala-data-load-*. Change-Id: I60d65794da08de4bb3eb439a2414c095f5be0c10 --- M bin/load-data.py M testdata/bin/create-load-data.sh M testdata/bin/run-hive-server.sh M testdata/bin/run-step.sh 4 files changed, 61 insertions(+), 6 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/05/8405/1 -- To view, visit http://gerrit.cloudera.org:8080/8405 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newchange Gerrit-Change-Id: I60d65794da08de4bb3eb439a2414c095f5be0c10 Gerrit-Change-Number: 8405 Gerrit-PatchSet: 1 Gerrit-Owner: Philip Zeyliger <phi...@cloudera.com>
