[
https://issues.apache.org/jira/browse/HADOOP-3155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12638068#action_12638068
]
Zheng Shao commented on HADOOP-3155:
------------------------------------
Some more information from facebook:
Completion Events from TASKTRACKER: (NOTE: line 1-3 and line 4-6 are duplicates)
NextId: 57
ID Event ID Task ID ID within Job Type Status
0 0 task_200810061724_5371_m_000019_0 19 Map
SUCCEEDED
1 0 task_200810061724_5371_m_000023_0 23 Map
SUCCEEDED
2 0 task_200810061724_5371_m_000008_0 8 Map
SUCCEEDED
3 0 task_200810061724_5371_m_000019_0 19 Map
SUCCEEDED
4 0 task_200810061724_5371_m_000023_0 23 Map
SUCCEEDED
5 0 task_200810061724_5371_m_000008_0 8 Map
SUCCEEDED
6 0 task_200810061724_5371_m_000012_0 12 Map
SUCCEEDED
7 0 task_200810061724_5371_m_000017_0 17 Map
SUCCEEDED
8 0 task_200810061724_5371_m_000021_0 21 Map
SUCCEEDED
9 0 task_200810061724_5371_m_000011_0 11 Map
SUCCEEDED
10 0 task_200810061724_5371_m_000015_0 15 Map
SUCCEEDED
11 0 task_200810061724_5371_m_000020_0 20 Map
SUCCEEDED
12 0 task_200810061724_5371_m_000003_0 3 Map
SUCCEEDED
13 0 task_200810061724_5371_m_000009_0 9 Map
SUCCEEDED
14 0 task_200810061724_5371_m_000004_0 4 Map
SUCCEEDED
15 0 task_200810061724_5371_m_000005_0 5 Map
SUCCEEDED
16 0 task_200810061724_5371_m_000013_0 13 Map
SUCCEEDED
17 0 task_200810061724_5371_m_000014_0 14 Map
SUCCEEDED
18 0 task_200810061724_5371_m_000006_0 6 Map
SUCCEEDED
19 0 task_200810061724_5371_m_000002_0 2 Map
SUCCEEDED
20 0 task_200810061724_5371_m_000007_0 7 Map
SUCCEEDED
21 0 task_200810061724_5371_m_000010_0 10 Map
SUCCEEDED
22 0 task_200810061724_5371_m_000001_0 1 Map
SUCCEEDED
23 0 task_200810061724_5371_m_000016_0 16 Map
SUCCEEDED
24 0 task_200810061724_5371_m_000018_0 18 Map
SUCCEEDED
25 0 task_200810061724_5371_m_000018_1 18 Map KILLED
Completion Events from JOBTRACKER:
ID Event ID Task ID ID within Job Type Status
0 0 task_200810061724_5371_m_000019_0 19 Map
SUCCEEDED
1 1 task_200810061724_5371_m_000023_0 23 Map
SUCCEEDED
2 2 task_200810061724_5371_m_000008_0 8 Map
SUCCEEDED
3 3 task_200810061724_5371_m_000024_0 24 Map
SUCCEEDED
4 4 task_200810061724_5371_m_000022_0 22 Map
SUCCEEDED
5 5 task_200810061724_5371_m_000000_0 0 Map
SUCCEEDED
6 6 task_200810061724_5371_m_000012_0 12 Map
SUCCEEDED
7 7 task_200810061724_5371_m_000017_0 17 Map
SUCCEEDED
8 8 task_200810061724_5371_m_000021_0 21 Map
SUCCEEDED
9 9 task_200810061724_5371_m_000011_0 11 Map
SUCCEEDED
10 10 task_200810061724_5371_m_000015_0 15 Map
SUCCEEDED
11 11 task_200810061724_5371_m_000020_0 20 Map
SUCCEEDED
12 12 task_200810061724_5371_m_000003_0 3 Map
SUCCEEDED
13 13 task_200810061724_5371_m_000009_0 9 Map
SUCCEEDED
14 14 task_200810061724_5371_m_000004_0 4 Map
SUCCEEDED
15 15 task_200810061724_5371_m_000005_0 5 Map
SUCCEEDED
16 16 task_200810061724_5371_m_000013_0 13 Map
SUCCEEDED
17 17 task_200810061724_5371_m_000014_0 14 Map
SUCCEEDED
18 18 task_200810061724_5371_m_000006_0 6 Map
SUCCEEDED
19 19 task_200810061724_5371_m_000002_0 2 Map
SUCCEEDED
20 20 task_200810061724_5371_m_000007_0 7 Map
SUCCEEDED
21 21 task_200810061724_5371_m_000010_0 10 Map
SUCCEEDED
22 22 task_200810061724_5371_m_000001_0 1 Map
SUCCEEDED
23 23 task_200810061724_5371_m_000016_0 16 Map
SUCCEEDED
24 24 task_200810061724_5371_m_000018_0 18 Map
SUCCEEDED
25 25 task_200810061724_5371_r_000000_0 0 Reduce
SUCCEEDED
26 26 task_200810061724_5371_r_000005_0 5 Reduce
SUCCEEDED
27 27 task_200810061724_5371_r_000009_0 9 Reduce
SUCCEEDED
28 28 task_200810061724_5371_r_000007_0 7 Reduce
SUCCEEDED
29 29 task_200810061724_5371_r_000004_0 4 Reduce
SUCCEEDED
30 30 task_200810061724_5371_r_000030_0 30 Reduce
SUCCEEDED
31 31 task_200810061724_5371_r_000026_0 26 Reduce
SUCCEEDED
32 32 task_200810061724_5371_r_000024_0 24 Reduce
SUCCEEDED
33 33 task_200810061724_5371_r_000018_0 18 Reduce
SUCCEEDED
34 34 task_200810061724_5371_r_000021_0 21 Reduce
SUCCEEDED
35 35 task_200810061724_5371_r_000015_0 15 Reduce
SUCCEEDED
36 36 task_200810061724_5371_r_000019_0 19 Reduce
SUCCEEDED
37 37 task_200810061724_5371_r_000022_0 22 Reduce
SUCCEEDED
38 38 task_200810061724_5371_r_000008_0 8 Reduce
SUCCEEDED
39 39 task_200810061724_5371_r_000028_0 28 Reduce
SUCCEEDED
40 40 task_200810061724_5371_r_000001_0 1 Reduce
SUCCEEDED
41 41 task_200810061724_5371_r_000014_0 14 Reduce
SUCCEEDED
42 42 task_200810061724_5371_r_000025_0 25 Reduce
SUCCEEDED
43 43 task_200810061724_5371_r_000003_0 3 Reduce
SUCCEEDED
44 44 task_200810061724_5371_r_000010_0 10 Reduce
SUCCEEDED
45 45 task_200810061724_5371_r_000017_0 17 Reduce
SUCCEEDED
46 46 task_200810061724_5371_r_000016_0 16 Reduce
SUCCEEDED
47 47 task_200810061724_5371_r_000002_0 2 Reduce
SUCCEEDED
48 48 task_200810061724_5371_r_000011_0 11 Reduce
SUCCEEDED
49 49 task_200810061724_5371_r_000023_0 23 Reduce
SUCCEEDED
50 50 task_200810061724_5371_r_000029_0 29 Reduce
SUCCEEDED
51 51 task_200810061724_5371_r_000020_0 20 Reduce
SUCCEEDED
52 52 task_200810061724_5371_r_000027_0 27 Reduce
SUCCEEDED
53 53 task_200810061724_5371_m_000018_1 18 Map KILLED
54 54 task_200810061724_5371_r_000012_0 12 Reduce
SUCCEEDED
55 55 task_200810061724_5371_r_000006_0 6 Reduce KILLED
56 56 task_200810061724_5371_r_000006_1 6 Reduce
SUCCEEDED
Basically TaskTracker get some duplicates for some mysterious reasons. Dhruba
also finds that at the time of these duplicate we see RPC time out on the task
tracker.
> reducers stuck at shuffling
> ----------------------------
>
> Key: HADOOP-3155
> URL: https://issues.apache.org/jira/browse/HADOOP-3155
> Project: Hadoop Core
> Issue Type: Bug
> Reporter: Runping Qi
> Assignee: Amareshwari Sriramadasu
> Attachments: events-job_200807311630_0007.txt,
> hadoop-3155-logs.tar.gz, jobevents_1007.txt, patch-3155-debug-0.16.txt,
> patch-3155-debug-0.17.txt, task_200807311630_0007_r_000006_0.syslog.gz
>
>
> This happened with hadoop-0.16.2:
> In relatively small job (a few hundreds of mappers and reducers), reducers
> were stuck at shuffling.
> I saw the lines like the following repeated hundreds of thousands of times
> over a few hours:
> 2008-04-02 17:17:44,640 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:44,641 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:44,641 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:44,641 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:17:46,643 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:46,643 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:46,643 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:46,643 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:17:48,645 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:48,645 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:48,645 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:48,645 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:17:50,647 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:50,647 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:50,647 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:50,647 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:17:52,649 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:52,650 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:52,650 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:52,650 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:17:54,651 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:54,652 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:54,652 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:54,652 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:17:56,654 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:56,654 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:56,654 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:56,654 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:17:58,656 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:17:58,656 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:17:58,656 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:17:58,656 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:00,658 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:00,658 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:00,658 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:00,658 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:02,660 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:02,661 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:02,661 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:02,661 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:04,662 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:04,663 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:04,663 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:04,663 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:06,664 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:06,665 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:06,665 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:06,665 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:08,667 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:08,667 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:08,667 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:08,667 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:10,669 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:10,669 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:10,669 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:10,669 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:12,671 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:12,671 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:12,671 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:12,671 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:14,673 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:14,674 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:14,674 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:14,674 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:16,675 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:16,676 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:16,676 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:16,676 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:18,678 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:18,678 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:18,678 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:18,678 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:20,680 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:20,680 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:20,680 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
> 2008-04-02 17:18:20,680 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Scheduled 0 of 0 known outputs (0 slow
> hosts and 0 dup hosts)
> 2008-04-02 17:18:22,682 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Need 2 map output(s)
> 2008-04-02 17:18:22,682 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0: Got 0 new map-outputs & 0 obsolete
> map-outputs from tasktracker and 0 map-outputs from previous failures
> 2008-04-02 17:18:22,682 INFO org.apache.hadoop.mapred.ReduceTask:
> task_200804021200_0337_r_000008_0 Got 0 known map output location(s);
> scheduling...
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
