I got the same issue today. map tasks finished quickly but reduce is always 0%. I am also running Mac OS X 10.8. (cdh3u4)
12/08/31 01:13:03 INFO mapred.JobClient: map 0% reduce 0% 12/08/31 01:13:07 INFO mapred.JobClient: map 100% reduce 0% 12/08/31 01:23:14 INFO mapred.JobClient: Task Id : attempt_201208310112_0001_r_000000_0, Status : FAILED Task attempt_201208310112_0001_r_000000_0 failed to report status for 600 seconds. Killing! logs for the reducer : Task Logs: 'attempt_201208310112_0001_r_000000_0' stdout logs stderr logs 2012-08-31 01:13:06.316 java[46834:1203] Unable to load realm info from SCDynamicStore syslog logs 2012-08-31 01:13:06,421 INFO org.apache.hadoop.security.UserGroupInformation: JAAS Configuration already set up for Hadoop, not re-installing. 2012-08-31 01:13:06,674 WARN org.apache.hadoop.util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 2012-08-31 01:13:06,848 INFO org.apache.hadoop.metrics.jvm.JvmMetrics: Initializing JVM Metrics with processName=SHUFFLE, sessionId= 2012-08-31 01:13:06,945 INFO org.apache.hadoop.mapred.Task: Using ResourceCalculatorPlugin : null 2012-08-31 01:13:06,957 INFO org.apache.hadoop.mapred.ReduceTask: ShuffleRamManager: MemoryLimit=144965632, MaxSingleShuffleLimit=36241408 2012-08-31 01:13:06,962 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Thread started: Thread for merging on-disk files 2012-08-31 01:13:06,963 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Thread waiting: Thread for merging on-disk files 2012-08-31 01:13:06,963 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Thread started: Thread for merging in memory files 2012-08-31 01:13:06,964 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Thread started: Thread for polling Map Completion Events 2012-08-31 01:13:06,964 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Need another 1 map output(s) where 0 is already in progress 2012-08-31 01:13:06,965 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-08-31 01:13:11,966 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Scheduled 1 outputs (0 slow hosts and0 dup hosts) 2012-08-31 01:14:07,996 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-08-31 01:14:07,996 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-08-31 01:15:08,033 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-08-31 01:15:08,033 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-08-31 01:16:08,069 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-08-31 01:16:08,070 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-08-31 01:17:08,106 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-08-31 01:17:08,107 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Scheduled 0 outputs (0 slow hosts and0 dup hosts) 2012-08-31 01:18:08,147 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Need another 1 map output(s) where 1 is already in progress 2012-08-31 01:18:08,147 INFO org.apache.hadoop.mapred.ReduceTask: attempt_201208310112_0001_r_000000_0 Scheduled 0 outputs (0 slow hosts and0 dup hosts) I can successfully run the wordcount example on my old macbook (os x 10.6) previously. Any suggestions ? Best Regards, Stone On Mon, Aug 13, 2012 at 12:21 PM, Subho Banerjee <subs.z...@gmail.com>wrote: > Hello, > > I am running hadoop v1.0.3 in Mac OS X 10.8 with Java_1.6.0_33-b03-424 > > > When running hadoop on pseudo-distributed mode, the map seems to work, but > it cannot compute the reduce. > > 12/08/13 08:58:12 INFO mapred.JobClient: Running job: job_201208130857_0001 > 12/08/13 08:58:13 INFO mapred.JobClient: map 0% reduce 0% > 12/08/13 08:58:27 INFO mapred.JobClient: map 20% reduce 0% > 12/08/13 08:58:33 INFO mapred.JobClient: map 30% reduce 0% > 12/08/13 08:58:36 INFO mapred.JobClient: map 40% reduce 0% > 12/08/13 08:58:39 INFO mapred.JobClient: map 50% reduce 0% > 12/08/13 08:58:42 INFO mapred.JobClient: map 60% reduce 0% > 12/08/13 08:58:45 INFO mapred.JobClient: map 70% reduce 0% > 12/08/13 08:58:48 INFO mapred.JobClient: map 80% reduce 0% > 12/08/13 08:58:51 INFO mapred.JobClient: map 90% reduce 0% > 12/08/13 08:58:54 INFO mapred.JobClient: map 100% reduce 0% > 12/08/13 08:59:14 INFO mapred.JobClient: Task Id : > attempt_201208130857_0001_m_000000_0, Status : FAILED > Too many fetch-failures > 12/08/13 08:59:14 WARN mapred.JobClient: Error reading task outputServer > returned HTTP response code: 403 for URL: > http://10.1.66.17:50060/tasklog?plaintext=true&attemptid=attempt_201208130857_0001_m_000000_0&filter=stdout > 12/08/13 08:59:14 WARN mapred.JobClient: Error reading task outputServer > returned HTTP response code: 403 for URL: > http://10.1.66.17:50060/tasklog?plaintext=true&attemptid=attempt_201208130857_0001_m_000000_0&filter=stderr > 12/08/13 08:59:18 INFO mapred.JobClient: map 89% reduce 0% > 12/08/13 08:59:21 INFO mapred.JobClient: map 100% reduce 0% > 12/08/13 09:00:14 INFO mapred.JobClient: Task Id : > attempt_201208130857_0001_m_000001_0, Status : FAILED > Too many fetch-failures > > Here is what I get when I try to see the tasklog using the links given in > the output > > > http://10.1.66.17:50060/tasklog?plaintext=true&attemptid=attempt_201208130857_0001_m_000000_0&filter=stderr > ---> > 2012-08-13 08:58:39.189 java[74092:1203] Unable to load realm info from > SCDynamicStore > > > http://10.1.66.17:50060/tasklog?plaintext=true&attemptid=attempt_201208130857_0001_m_000000_0&filter=stdout > ---> > > I have changed my hadoop-env.sh acoording to Mathew Buckett in > https://issues.apache.org/jira/browse/HADOOP-7489 > > Also this error of Unable to load realm info from SCDynamicStore does not > show up when I do 'hadoop namenode -format' or 'start-all.sh' > > I am also attaching a zipped copy of my logs > > > Cheers, > > Subho. >
