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From Jothi Padmanabhan <joth...@yahoo-inc.com>
Subject Re: ioexception during reduce.
Date Fri, 24 Apr 2009 08:43:01 GMT
Hi Brady,

Could you please check the TaskTracker logs (TTs that ran the maps that are
failing copy) and see what error you are seeing there?

Jothi

On 4/24/09 5:15 AM, "Brady Chang" <bchang@atipa.com> wrote:

> Hello all,
> 
> One of my customer's getting the following when increase input size.
> 
> same process runs fine with smaller input size.
> 
> /tmp has plenty of space,
> 
> each data node has 64 Gig memory.
> 
> hadoop 0-19.1
> 
> Please let me know if you need any additional info.
> 
>  
> 
> [root@head attempt_200904181818_0020_r_000002_1]# cat syslog
> 
> 2009-04-20 00:52:52,898 INFO org.apache.hadoop.metrics.jvm.JvmMetrics:
> Initializing JVM Metrics with processName=SHUFFLE, sessionId=
> 
> 2009-04-20 00:52:53,005 INFO org.apache.hadoop.mapred.ReduceTask:
> ShuffleRamManager: MemoryLimit=130514944, MaxSingleShuffleLimit=32628736
> 
> 2009-04-20 00:52:53,013 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Thread started: Thread for merging
> on-disk files
> 
> 2009-04-20 00:52:53,013 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Thread started: Thread for merging in
> memory files
> 
> 2009-04-20 00:52:53,013 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Thread waiting: Thread for merging
> on-disk files
> 
> 2009-04-20 00:52:53,015 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Need another 168 map output(s) where 0
> is already in progress
> 
> 2009-04-20 00:52:53,042 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1: Got 168 new map-outputs
> 
> 2009-04-20 00:52:53,042 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Scheduled 8 outputs (0 slow hosts and0
> dup hosts)
> 
> 2009-04-20 00:52:53,068 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000002_0
> 
> 2009-04-20 00:52:53,069 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000006_0
> 
> 2009-04-20 00:52:53,069 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000003_0
> 
> 2009-04-20 00:52:53,069 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000016_0
> 
> 2009-04-20 00:52:53,069 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000012_0
> 
> 2009-04-20 00:52:53,073 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000016_0
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000006_0
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000012_0
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000003_0
> 
> 2009-04-20 00:52:53,073 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000002_0
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000012_0 -> (-1, -1) from n2
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000016_0 -> (-1, -1) from n8
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000006_0 -> (-1, -1) from n4
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000002_0 -> (-1, -1) from n5
> 
> 2009-04-20 00:52:53,074 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000003_0 -> (-1, -1) from n7
> 
> 2009-04-20 00:52:53,078 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000007_0
> 
> 2009-04-20 00:52:53,078 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000007_0
> 
> 2009-04-20 00:52:53,078 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000007_0 -> (-1, -1) from n3
> 
> 2009-04-20 00:52:53,078 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000037_0
> 
> 2009-04-20 00:52:53,078 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000037_0
> 
> 2009-04-20 00:52:53,079 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000037_0 -> (-1, -1) from n1
> 
> 2009-04-20 00:52:53,079 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000033_0
> 
> 2009-04-20 00:52:53,079 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000033_0
> 
> 2009-04-20 00:52:53,079 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000033_0 -> (-1, -1) from n6
> 
> 2009-04-20 00:52:55,021 INFO org.apache.hadoop.mapred.ReduceTask: Ignoring
> obsolete output of KILLED map-task: 'attempt_200904181818_0020_m_000166_1'
> 
> 2009-04-20 00:52:55,021 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1: Got 1 obsolete map-outputs from
> tasktracker 
> 
> 2009-04-20 00:52:55,022 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Scheduled 8 outputs (0 slow hosts and0
> dup hosts)
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000005_0
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000005_0
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000005_0 -> (-1, -1) from n1
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000014_0
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000004_0
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000014_0
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000004_0
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000014_0 -> (-1, -1) from n4
> 
> 2009-04-20 00:52:55,024 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000004_0 -> (-1, -1) from n2
> 
> 2009-04-20 00:52:55,025 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000019_0
> 
> 2009-04-20 00:52:55,025 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000018_0
> 
> 2009-04-20 00:52:55,025 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000019_0
> 
> 2009-04-20 00:52:55,025 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000018_0
> 
> 2009-04-20 00:52:55,025 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000019_0 -> (-1, -1) from n7
> 
> 2009-04-20 00:52:55,025 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000018_0 -> (-1, -1) from n5
> 
> 2009-04-20 00:52:55,025 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000008_0
> 
> 2009-04-20 00:52:55,026 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000008_0
> 
> 2009-04-20 00:52:55,026 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000008_0 -> (-1, -1) from n8
> 
> 2009-04-20 00:52:55,026 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000015_0
> 
> 2009-04-20 00:52:55,026 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000015_0
> 
> 2009-04-20 00:52:55,026 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000015_0 -> (-1, -1) from n3
> 
> 2009-04-20 00:52:55,026 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000001_0
> 
> 2009-04-20 00:52:55,027 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000001_0
> 
> 2009-04-20 00:52:55,027 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000001_0 -> (-1, -1) from n6
> 
> 2009-04-20 00:52:57,026 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Scheduled 8 outputs (0 slow hosts and0
> dup hosts)
> 
> 2009-04-20 00:52:57,028 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000029_0
> 
> 2009-04-20 00:52:57,028 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000029_0
> 
> 2009-04-20 00:52:57,028 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000029_0 -> (-1, -1) from n1
> 
> 2009-04-20 00:52:57,028 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000011_0
> 
> 2009-04-20 00:52:57,028 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000020_0
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000026_0
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000011_0
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000020_0
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000011_0 -> (-1, -1) from n7
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000020_0 -> (-1, -1) from n2
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000026_0
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000047_0
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000026_0 -> (-1, -1) from n5
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000047_0
> 
> 2009-04-20 00:52:57,029 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000047_0 -> (-1, -1) from n3
> 
> 2009-04-20 00:52:57,030 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000022_0
> 
> 2009-04-20 00:52:57,030 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000022_0
> 
> 2009-04-20 00:52:57,030 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000022_0 -> (-1, -1) from n4
> 
> 2009-04-20 00:52:57,031 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000049_0
> 
> 2009-04-20 00:52:57,031 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000049_0
> 
> 2009-04-20 00:52:57,031 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000049_0 -> (-1, -1) from n6
> 
> 2009-04-20 00:52:57,031 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000000_0
> 
> 2009-04-20 00:52:57,031 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000000_0
> 
> 2009-04-20 00:52:57,031 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000000_0 -> (-1, -1) from n8
> 
> 2009-04-20 00:52:59,029 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Scheduled 8 outputs (0 slow hosts and0
> dup hosts)
> 
> 2009-04-20 00:52:59,031 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000052_0
> 
> 2009-04-20 00:52:59,031 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000052_0
> 
> 2009-04-20 00:52:59,031 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000074_0
> 
> 2009-04-20 00:52:59,031 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000052_0 -> (-1, -1) from n2
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000074_0
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000074_0 -> (-1, -1) from n5
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000017_0
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000017_0
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000017_0 -> (-1, -1) from n6
> 
> 2009-04-20 00:52:59,031 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000038_0
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000056_0
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000038_0
> 
> 2009-04-20 00:52:59,032 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000056_0
> 
> 2009-04-20 00:52:59,033 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000038_0 -> (-1, -1) from n4
> 
> 2009-04-20 00:52:59,033 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000056_0 -> (-1, -1) from n8
> 
> 2009-04-20 00:52:59,033 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000023_0
> 
> 2009-04-20 00:52:59,033 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000023_0
> 
> 2009-04-20 00:52:59,033 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000023_0 -> (-1, -1) from n3
> 
> 2009-04-20 00:52:59,033 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000013_0
> 
> 2009-04-20 00:52:59,034 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000013_0
> 
> 2009-04-20 00:52:59,034 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000013_0 -> (-1, -1) from n1
> 
> 2009-04-20 00:52:59,034 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000027_0
> 
> 2009-04-20 00:52:59,034 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000027_0
> 
> 2009-04-20 00:52:59,034 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000027_0 -> (-1, -1) from n7
> 
> 2009-04-20 00:53:01,033 INFO org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 Scheduled 8 outputs (0 slow hosts and0
> dup hosts)
> 
> 2009-04-20 00:53:01,035 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000055_0
> 
> 2009-04-20 00:53:01,035 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000055_0
> 
> 2009-04-20 00:53:01,035 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000055_0 -> (-1, -1) from n3
> 
> 2009-04-20 00:53:01,035 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000025_0
> 
> 2009-04-20 00:53:01,036 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000025_0
> 
> 2009-04-20 00:53:01,036 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000025_0 -> (-1, -1) from n6
> 
> 2009-04-20 00:53:01,036 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000035_0
> 
> 2009-04-20 00:53:01,036 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000035_0
> 
> 2009-04-20 00:53:01,036 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000035_0 -> (-1, -1) from n7
> 
> 2009-04-20 00:53:01,037 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000021_0
> 
> 2009-04-20 00:53:01,037 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000021_0
> 
> 2009-04-20 00:53:01,037 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000021_0 -> (-1, -1) from n1
> 
> 2009-04-20 00:53:01,038 INFO org.apache.hadoop.mapred.ReduceTask: Shuffling
> 2 bytes (6 raw bytes) into RAM from attempt_200904181818_0020_m_000034_0
> 
> 2009-04-20 00:53:01,038 INFO org.apache.hadoop.mapred.ReduceTask: Read 2
> bytes from map-output for attempt_200904181818_0020_m_000034_0
> 
> 2009-04-20 00:53:01,038 INFO org.apache.hadoop.mapred.ReduceTask: Rec #1
> from attempt_200904181818_0020_m_000034_0 -> (-1, -1) from n5
> 
> 2009-04-20 00:53:01,041 WARN org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 copy failed:
> attempt_200904181818_0020_m_000044_0 from n2
> 
> 2009-04-20 00:53:01,041 WARN org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 copy failed:
> attempt_200904181818_0020_m_000054_0 from n4
> 
> 2009-04-20 00:53:01,041 WARN org.apache.hadoop.mapred.ReduceTask:
> attempt_200904181818_0020_r_000002_1 copy failed:
> attempt_200904181818_0020_m_000032_0 from n8
> 
> 2009-04-20 00:53:01,042 WARN org.apache.hadoop.mapred.ReduceTask:
> java.io.FileNotFoundException:
> http://n2:50060/mapOutput?job=job_200904181818_0020&map=attempt_200904181818
> _0020_m_000044_0&reduce=2
> 
>         at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> 
>         at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
> sorImpl.java:39)
> 
>         at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
> torAccessorImpl.java:27)
> 
>         at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:136
> 0)
> 
>         at java.security.AccessController.doPrivileged(Native Method)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConne
> ction.java:1354)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection
> .java:1008)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getInputStr
> eam(ReduceTask.java:1293)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getMapOutpu
> t(ReduceTask.java:1231)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.copyOutput(
> ReduceTask.java:1144)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.run(ReduceT
> ask.java:1084)
> 
> Caused by: java.io.FileNotFoundException:
> http://n2:50060/mapOutput?job=job_200904181818_0020&map=attempt_200904181818
> _0020_m_000044_0&reduce=2
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection
> .java:1303)
> 
>         ... 4 more
> 
>  
> 
> 2009-04-20 00:53:01,042 WARN org.apache.hadoop.mapred.ReduceTask:
> java.io.FileNotFoundException:
> http://n8:50060/mapOutput?job=job_200904181818_0020&map=attempt_200904181818
> _0020_m_000032_0&reduce=2
> 
>         at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> 
>         at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
> sorImpl.java:39)
> 
>         at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
> torAccessorImpl.java:27)
> 
>         at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:136
> 0)
> 
>         at java.security.AccessController.doPrivileged(Native Method)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConne
> ction.java:1354)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection
> .java:1008)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getInputStr
> eam(ReduceTask.java:1293)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getMapOutpu
> t(ReduceTask.java:1231)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.copyOutput(
> ReduceTask.java:1144)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.run(ReduceT
> ask.java:1084)
> 
> Caused by: java.io.FileNotFoundException:
> http://n8:50060/mapOutput?job=job_200904181818_0020&map=attempt_200904181818
> _0020_m_000032_0&reduce=2
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection
> .java:1303)
> 
>         ... 4 more
> 
>  
> 
> 2009-04-20 00:53:01,042 WARN org.apache.hadoop.mapred.ReduceTask:
> java.io.FileNotFoundException:
> http://n4:50060/mapOutput?job=job_200904181818_0020&map=attempt_200904181818
> _0020_m_000054_0&reduce=2
> 
>         at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> Method)
> 
>         at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAcces
> sorImpl.java:39)
> 
>         at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstruc
> torAccessorImpl.java:27)
> 
>         at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:136
> 0)
> 
>         at java.security.AccessController.doPrivileged(Native Method)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConne
> ction.java:1354)
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection
> .java:1008)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getInputStr
> eam(ReduceTask.java:1293)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.getMapOutpu
> t(ReduceTask.java:1231)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.copyOutput(
> ReduceTask.java:1144)
> 
>         at
> org.apache.hadoop.mapred.ReduceTask$ReduceCopier$MapOutputCopier.run(ReduceT
> ask.java:1084)
> 
> Caused by: java.io.FileNotFoundException:
> http://n4:50060/mapOutput?job=job_200904181818_0020&map=attempt_200904181818
> _0020_m_000054_0&reduce=2
> 
>         at
> sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection
> .java:1303)
> 
>         ... 4 more
> 


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