Well That was one of the things I had asked. ulimit -a says it all. But you have to do this for the users... hdfs, mapred, and hadoop
(Which is why I asked about which flavor.) On May 3, 2012, at 7:03 PM, Raj Vishwanathan wrote: > Keith > > What is the the output for ulimit -n? Your value for number of open files is > probably too low. > > Raj > > > > >> ________________________________ >> From: Keith Thompson <kthom...@binghamton.edu> >> To: common-user@hadoop.apache.org >> Sent: Thursday, May 3, 2012 4:33 PM >> Subject: Re: Reduce Hangs at 66% >> >> I am not sure about ulimits, but I can answer the rest. It's a Cloudera >> distribution of Hadoop 0.20.2. The HDFS has 9 TB free. In the reduce step, >> I am taking keys in the form of (gridID, date), each with a value of 1. The >> reduce step just sums the 1's as the final output value for the key (It's >> counting how many people were in the gridID on a certain day). >> >> I have been running other more complicated jobs with no problem, so I'm not >> sure why this one is being peculiar. This is the code I used to execute the >> program from the command line (the source is a file on the hdfs): >> >> hadoop jar <jarfile> <driver> <source> /thompson/outputDensity/density1 >> >> The program then executes the map and gets to 66% of the reduce, then stops >> responding. The cause of the error seems to be: >> >> Error from attempt_201202240659_6432_r_000000_1: java.io.IOException: >>> The temporary job-output directory >>> hdfs://analytix1:9000/thompson/outputDensity/density1/_temporary >>> doesn't exist! >> >> I don't understand what the _temporary is. I am assuming it's something >> Hadoop creates automatically. >> >> >> >> On Thu, May 3, 2012 at 5:02 AM, Michel Segel >> <michael_se...@hotmail.com>wrote: >> >>> Well... >>> Lots of information but still missing some of the basics... >>> >>> Which release and version? >>> What are your ulimits set to? >>> How much free disk space do you have? >>> What are you attempting to do? >>> >>> Stuff like that. >>> >>> >>> >>> Sent from a remote device. Please excuse any typos... >>> >>> Mike Segel >>> >>> On May 2, 2012, at 4:49 PM, Keith Thompson <kthom...@binghamton.edu> >>> wrote: >>> >>>> I am running a task which gets to 66% of the Reduce step and then hangs >>>> indefinitely. Here is the log file (I apologize if I am putting too much >>>> here but I am not exactly sure what is relevant): >>>> >>>> 2012-05-02 16:42:52,975 INFO org.apache.hadoop.mapred.JobTracker: >>>> Adding task (REDUCE) 'attempt_201202240659_6433_r_000000_0' to tip >>>> task_201202240659_6433_r_000000, for tracker >>>> 'tracker_analytix7:localhost.localdomain/127.0.0.1:56515' >>>> 2012-05-02 16:42:53,584 INFO org.apache.hadoop.mapred.JobInProgress: >>>> Task 'attempt_201202240659_6433_m_000001_0' has completed >>>> task_201202240659_6433_m_000001 successfully. >>>> 2012-05-02 17:00:47,546 INFO org.apache.hadoop.mapred.TaskInProgress: >>>> Error from attempt_201202240659_6432_r_000000_0: Task >>>> attempt_201202240659_6432_r_000000_0 failed to report status for 1800 >>>> seconds. Killing! >>>> 2012-05-02 17:00:47,546 INFO org.apache.hadoop.mapred.JobTracker: >>>> Removing task 'attempt_201202240659_6432_r_000000_0' >>>> 2012-05-02 17:00:47,546 INFO org.apache.hadoop.mapred.JobTracker: >>>> Adding task (TASK_CLEANUP) 'attempt_201202240659_6432_r_000000_0' to >>>> tip task_201202240659_6432_r_000000, for tracker >>>> 'tracker_analytix4:localhost.localdomain/127.0.0.1:44204' >>>> 2012-05-02 17:00:48,763 INFO org.apache.hadoop.mapred.JobTracker: >>>> Removing task 'attempt_201202240659_6432_r_000000_0' >>>> 2012-05-02 17:00:48,957 INFO org.apache.hadoop.mapred.JobTracker: >>>> Adding task (REDUCE) 'attempt_201202240659_6432_r_000000_1' to tip >>>> task_201202240659_6432_r_000000, for tracker >>>> 'tracker_analytix5:localhost.localdomain/127.0.0.1:59117' >>>> 2012-05-02 17:00:56,559 INFO org.apache.hadoop.mapred.TaskInProgress: >>>> Error from attempt_201202240659_6432_r_000000_1: java.io.IOException: >>>> The temporary job-output directory >>>> hdfs://analytix1:9000/thompson/outputDensity/density1/_temporary >>>> doesn't exist! >>>> at >>> org.apache.hadoop.mapred.FileOutputCommitter.getWorkPath(FileOutputCommitter.java:250) >>>> at >>> org.apache.hadoop.mapred.FileOutputFormat.getTaskOutputPath(FileOutputFormat.java:240) >>>> at >>> org.apache.hadoop.mapred.TextOutputFormat.getRecordWriter(TextOutputFormat.java:116) >>>> at >>> org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:438) >>>> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:416) >>>> at org.apache.hadoop.mapred.Child$4.run(Child.java:268) >>>> at java.security.AccessController.doPrivileged(Native Method) >>>> at javax.security.auth.Subject.doAs(Subject.java:396) >>>> at >>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115) >>>> at org.apache.hadoop.mapred.Child.main(Child.java:262) >>>> >>>> 2012-05-02 17:00:59,903 INFO org.apache.hadoop.mapred.JobTracker: >>>> Removing task 'attempt_201202240659_6432_r_000000_1' >>>> 2012-05-02 17:00:59,906 INFO org.apache.hadoop.mapred.JobTracker: >>>> Adding task (REDUCE) 'attempt_201202240659_6432_r_000000_2' to tip >>>> task_201202240659_6432_r_000000, for tracker >>>> 'tracker_analytix3:localhost.localdomain/127.0.0.1:39980' >>>> 2012-05-02 17:01:07,200 INFO org.apache.hadoop.mapred.TaskInProgress: >>>> Error from attempt_201202240659_6432_r_000000_2: java.io.IOException: >>>> The temporary job-output directory >>>> hdfs://analytix1:9000/thompson/outputDensity/density1/_temporary >>>> doesn't exist! >>>> at >>> org.apache.hadoop.mapred.FileOutputCommitter.getWorkPath(FileOutputCommitter.java:250) >>>> at >>> org.apache.hadoop.mapred.FileOutputFormat.getTaskOutputPath(FileOutputFormat.java:240) >>>> at >>> org.apache.hadoop.mapred.TextOutputFormat.getRecordWriter(TextOutputFormat.java:116) >>>> at >>> org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:438) >>>> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:416) >>>> at org.apache.hadoop.mapred.Child$4.run(Child.java:268) >>>> at java.security.AccessController.doPrivileged(Native Method) >>>> at javax.security.auth.Subject.doAs(Subject.java:396) >>>> at >>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115) >>>> at org.apache.hadoop.mapred.Child.main(Child.java:262) >>>> >>>> 2012-05-02 17:01:10,239 INFO org.apache.hadoop.mapred.JobTracker: >>>> Removing task 'attempt_201202240659_6432_r_000000_2' >>>> 2012-05-02 17:01:10,283 INFO org.apache.hadoop.mapred.JobTracker: >>>> Adding task (REDUCE) 'attempt_201202240659_6432_r_000000_3' to tip >>>> task_201202240659_6432_r_000000, for tracker >>>> 'tracker_analytix2:localhost.localdomain/127.0.0.1:33297' >>>> 2012-05-02 17:01:18,188 INFO org.apache.hadoop.mapred.TaskInProgress: >>>> Error from attempt_201202240659_6432_r_000000_3: java.io.IOException: >>>> The temporary job-output directory >>>> hdfs://analytix1:9000/thompson/outputDensity/density1/_temporary >>>> doesn't exist! >>>> at >>> org.apache.hadoop.mapred.FileOutputCommitter.getWorkPath(FileOutputCommitter.java:250) >>>> at >>> org.apache.hadoop.mapred.FileOutputFormat.getTaskOutputPath(FileOutputFormat.java:240) >>>> at >>> org.apache.hadoop.mapred.TextOutputFormat.getRecordWriter(TextOutputFormat.java:116) >>>> at >>> org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:438) >>>> at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:416) >>>> at org.apache.hadoop.mapred.Child$4.run(Child.java:268) >>>> at java.security.AccessController.doPrivileged(Native Method) >>>> at javax.security.auth.Subject.doAs(Subject.java:396) >>>> at >>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115) >>>> at org.apache.hadoop.mapred.Child.main(Child.java:262) >>>> >>>> 2012-05-02 17:01:21,228 INFO org.apache.hadoop.mapred.TaskInProgress: >>>> TaskInProgress task_201202240659_6432_r_000000 has failed 4 times. >>>> 2012-05-02 17:01:21,228 INFO org.apache.hadoop.mapred.JobInProgress: >>>> Aborting job job_201202240659_6432 >>>> 2012-05-02 17:01:21,228 INFO org.apache.hadoop.mapred.JobInProgress: >>>> Killing job 'job_201202240659_6432' >>>> 2012-05-02 17:01:21,228 INFO org.apache.hadoop.mapred.JobTracker: >>>> Adding task (JOB_CLEANUP) 'attempt_201202240659_6432_m_000002_0' to >>>> tip task_201202240659_6432_m_000002, for tracker >>>> 'tracker_analytix2:localhost.localdomain/127.0.0.1:33297' >>>> 2012-05-02 17:01:21,228 INFO org.apache.hadoop.mapred.JobTracker: >>>> Removing task 'attempt_201202240659_6432_r_000000_3' >>>> 2012-05-02 17:01:22,443 INFO org.apache.hadoop.mapred.JobInProgress: >>>> Task 'attempt_201202240659_6432_m_000002_0' has completed >>>> task_201202240659_6432_m_000002 successfully. >>>> 2012-05-02 17:01:22,443 INFO >>>> org.apache.hadoop.mapred.JobInProgress$JobSummary: >>>> >>> jobId=job_201202240659_6432,submitTime=1335990629637,launchTime=1335990629702,firstMapTaskLaunchTime=1335990631252,firstReduceTaskLaunchTime=1335990633988,firstJobSetupTaskLaunchTime=1335990629727,firstJobCleanupTaskLaunchTime=1335992481228,finishTime=1335992482443,numMaps=2,numSlotsPerMap=1,numReduces=1,numSlotsPerReduce=1,user=thompson,queue=default,status=FAILED,mapSlotSeconds=7,reduceSlotsSeconds=32,clusterMapCapacity=138,clusterReduceCapacity=138 >>>> 2012-05-02 17:01:22,446 WARN org.apache.hadoop.hdfs.DFSClient: >>>> DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: >>>> org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease >>>> on >>> /thompson/outputDensity/density1/_logs/history/analytix1_1330084785363_job_201202240659_6432_thompson_TwitterDensity >>>> File does not exist. Holder DFSClient_1931891231 does not have any >>>> open files. >>>> at >>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1542) >>>> at >>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1533) >>>> at >>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1449) >>>> at >>> org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:649) >>>> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source) >>>> at >>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >>>> at java.lang.reflect.Method.invoke(Method.java:597) >>>> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557) >>>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1415) >>>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1411) >>>> at java.security.AccessController.doPrivileged(Native Method) >>>> at javax.security.auth.Subject.doAs(Subject.java:396) >>>> at >>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115) >>>> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1409) >>>> >>>> at org.apache.hadoop.ipc.Client.call(Client.java:1104) >>>> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:226) >>>> at $Proxy4.addBlock(Unknown Source) >>>> at sun.reflect.GeneratedMethodAccessor10.invoke(Unknown Source) >>>> at >>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >>>> at java.lang.reflect.Method.invoke(Method.java:597) >>>> at >>> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82) >>>> at >>> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59) >>>> at $Proxy4.addBlock(Unknown Source) >>>> at >>> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3185) >>>> at >>> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3055) >>>> at >>> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$1900(DFSClient.java:2305) >>>> at >>> org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2500) >>>> >>>> 2012-05-02 17:01:22,446 WARN org.apache.hadoop.hdfs.DFSClient: Error >>>> Recovery for block null bad datanode[0] nodes == null >>>> 2012-05-02 17:01:22,446 WARN org.apache.hadoop.hdfs.DFSClient: Could >>>> not get block locations. Source file >>>> >>> "/thompson/outputDensity/density1/_logs/history/analytix1_1330084785363_job_201202240659_6432_thompson_TwitterDensity" >>>> - Aborting... >>>> 2012-05-02 17:01:22,446 INFO org.apache.hadoop.mapred.JobHistory: >>>> Moving >>> file:/var/log/hadoop/history/analytix1_1330084785363_job_201202240659_6432_thompson_TwitterDensity >>>> to file:/var/log/hadoop/history/done >>>> 2012-05-02 17:01:22,447 ERROR org.apache.hadoop.hdfs.DFSClient: >>>> Exception closing file >>>> >>> /thompson/outputDensity/density1/_logs/history/analytix1_1330084785363_job_201202240659_6432_thompson_TwitterDensity >>>> : org.apache.hadoop.ipc.RemoteException: >>>> org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease >>>> on >>> /thompson/outputDensity/density1/_logs/history/analytix1_1330084785363_job_201202240659_6432_thompson_TwitterDensity >>>> File does not exist. Holder DFSClient_1931891231 does not have any >>>> open files. >>>> at >>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1542) >>>> at >>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.checkLease(FSNamesystem.java:1533) >>>> at >>> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1449) >>>> at >>> org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:649) >>>> at sun.reflect.GeneratedMethodAccessor63.invoke(Unknown Source) >>>> at >>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) >>>> at java.lang.reflect.Method.invoke(Method.java:597) >>>> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:557) >>>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1415) >>>> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1411) >>>> at java.security.AccessController.doPrivileged(Native Method) >>>> at javax.security.auth.Subject.doAs(Subject.java:396) >>>> at >>> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1115) >>>> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1409) >>>> >>>> >>>> Can anyone explain to me what is causing the problem? >>>> >>>> -- >>>> *Keith Thompson* >>> >> >> >> >> -- >> *Keith Thompson* >> Graduate Research Associate, Xerox Corporation >> SUNY Research Foundation >> Dept. of Systems Science and Industrial Engineering >> Binghamton University >> Binghamton, NY 13902 >> >>
