Hi Where do we change the no of open files? Where do we do it in the master system
Rgds Prabhu On 2/12/06, Chris Schneider <[EMAIL PROTECTED]> wrote: > > Florent, > > You might want to try increasing the number of open files allowed on your > master machine. We've increased this twice now, and each time it solved > similar problems. We now have it at 16K. See my other post today (re: > Corrupt NDFS?) for more details. > > Good Luck, > > - Chris > > At 11:07 AM -0500 2/10/06, Florent Gluck wrote: > >Hi, > > > >I have 4 boxes (1 master, 3 slaves), about 33GB worth of segment data > >and 4.6M fetched urls in my crawldb. I'm using the mapred code from > >trunk (revision 374061, Wed, 01 Feb 2006). > >I was able to generate the indexes from the crawldb and linkdb, but I > >started to see this error recently while running a dedup on my indexes: > > > >.... > >060210 061707 reduce 9% > >060210 061710 reduce 10% > >060210 061713 reduce 11% > >060210 061717 reduce 12% > >060210 061719 reduce 11% > >060210 061723 reduce 10% > >060210 061725 reduce 11% > >060210 061726 reduce 10% > >060210 061729 reduce 11% > >060210 061730 reduce 9% > >060210 061732 reduce 10% > >060210 061736 reduce 11% > >060210 061739 reduce 12% > >060210 061742 reduce 10% > >060210 061743 reduce 9% > >060210 061745 reduce 10% > >060210 061746 reduce 100% > >Exception in thread "main" java.io.IOException: Job failed! > > at org.apache.nutch.mapred.JobClient.runJob(JobClient.java:310) > > at > >org.apache.nutch.indexer.DeleteDuplicates.dedup(DeleteDuplicates.java > :329) > > at > >org.apache.nutch.indexer.DeleteDuplicates.main(DeleteDuplicates.java:349) > > > >I can see a lot of these messages in the jobtracker log on the master: > >... > >060210 061743 Task 'task_r_4t50k4' has been lost. > >060210 061743 Task 'task_r_79vn7i' has been lost. > >... > > > >On every single slave, I get this file not found exception in the > >tasktracker log: > >060210 061749 Server handler 0 on 50040 caught: > >java.io.FileNotFoundException: > >/var/epile/nutch/mapred/local/task_m_273opj/part-4.out > >java.io.FileNotFoundException: > >/var/epile/nutch/mapred/local/task_m_273opj/part-4.out > > at > >org.apache.nutch.fs.LocalFileSystem.openRaw(LocalFileSystem.java:121) > >at > >org.apache.nutch.fs.NFSDataInputStream$Checker.<init>( > NFSDataInputStream.java:45) > > at > >org.apache.nutch.fs.NFSDataInputStream.<init>(NFSDataInputStream.java > :226) > > at > >org.apache.nutch.fs.NutchFileSystem.open(NutchFileSystem.java:160) > > at > >org.apache.nutch.mapred.MapOutputFile.write(MapOutputFile.java:93) > > at > >org.apache.nutch.io.ObjectWritable.writeObject(ObjectWritable.java:121) > > at org.apache.nutch.io.ObjectWritable.write(ObjectWritable.java > :68) > > at org.apache.nutch.ipc.Server$Handler.run(Server.java:215) > > > >I used to be able to complete the index dedupping successfully when my > >segments/crawldb was smaller, but I don't see why this would be related > >to the FileNotFoundException. I'm by far not running out of disk space > >and my hard discs work properly. > > > >Has anyone encountered a similar issue or has a clue about what's > happening? > > > >Thanks, > >Florent > > -- > ------------------------ > Chris Schneider > TransPac Software, Inc. > [EMAIL PROTECTED] > ------------------------ >
