[GIRAPH-1009] Spammy 'lost reservation' messages from ZooKeeper in workers' log at the end of the computation.

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.2.0
• Fix Version/s: 1.2.0
• Component/s: bsp, zookeeper
• Labels: log worker zookeeper

Environment

All environment, while running with more than one worker.

• Flags: Patch
• Assignee: Hassan Eslami
• Reporter: Hassan Eslami
• Created: 26/May/15 16:33
• Updated: 14/Oct/16 00:53
• Resolved: 15/Mar/16 22:00

Description

When running Giraph with more than one worker, ZooKeeper usually throws a bunch of 'lost reservation' info log messages for input splits at the end of the computation in workers' log. This clutters log file of workers, specially in cases where the job is running on a large graph with fairly large number of input splits.

Here are examples of these log messages:
...
INFO 2015-05-19 14:44:58,894 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/1126 lost reservation
INFO 2015-05-19 14:44:58,894 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/2585 lost reservation
INFO 2015-05-19 14:44:58,895 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/1166 lost reservation
INFO 2015-05-19 14:44:58,895 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/1212 lost reservation
INFO 2015-05-19 14:44:58,895 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/1666 lost reservation
INFO 2015-05-19 14:44:58,896 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/2282 lost reservation
INFO 2015-05-19 14:44:58,896 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/1302 lost reservation
INFO 2015-05-19 14:44:58,896 [main-EventThread] org.apache.giraph.worker.InputSplitsHandler - process: Input split /_hadoopBsp/job_201411061513.184523_0001/_edgeInputSplitDir/2364 lost reservation
...