Well, I tried it with the two machines that should be working fine, and
it still crapped out, though this time with a different exception.
060104 001346 task_m_y6k6jq Child Error
java.lang.NullPointerException
at java.io.BufferedInputStream.read(BufferedInputStream.java:279)
at
sun.nio.cs.StreamDecoder$CharsetSD.readBytes(StreamDecoder.java:408)
at
sun.nio.cs.StreamDecoder$CharsetSD.implRead(StreamDecoder.java:450)
at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:182)
at java.io.InputStreamReader.read(InputStreamReader.java:167)
at java.io.BufferedReader.fill(BufferedReader.java:136)
at java.io.BufferedReader.readLine(BufferedReader.java:299)
at java.io.BufferedReader.readLine(BufferedReader.java:362)
at org.apache.nutch.mapred.TaskRunner.logStream(TaskRunner.java:164)
at org.apache.nutch.mapred.TaskRunner.runChild(TaskRunner.java:136)
at org.apache.nutch.mapred.TaskRunner.run(TaskRunner.java:92)
060104 001407 Server connection on port 49627 from 127.0.0.2: exiting
-Matt Zytaruk
Stefan Groschupf wrote:
It do see stuff about crc's being ignored sometimes at the end of an
operation. Is there a setting for this?
Isn't it in the nutch-default.xml?
I have also just learned that the box i've been using as the job
tracker and ndfs name node has a wonky system timer. So maybe that
is the problem. I'm currently getting a test running using only the
other two machines.
Well this could may be the problem, I'm not sure how java handles the
system current millis behind the sense. Since you got a time out
exception may this could be a problem.
Stefan
-Matt
Stefan Groschupf wrote:
hmm, sounds strange, but I'm interested to dig to find the problem
source, since I'm very much interested to get 0.8 stabile asap.
However find such a problem source is a pain in the neck.
Do you use the latest sources from svn?
Do you ignore crc errors? Doug mentioned that he notice often
problems with this.
Stefan
Am 13.12.2005 um 20:28 schrieb Matt Zytaruk:
I dont think the network settings are the problem, as I have been
able to parse other segments using map reduce no problem. If it
was the network configuration, wouldn't it never work? However,
things do not seem to be stable, as some operations in ndfs will
error, and then I do the same thing 5 minutes later and it works
fine. Same with other things, some crawls work fine, others
throw exceptions and crash (I actually had a crawl crash with the
same problem as below). This is using 3 Opteron boxes running
Suse Linux.
-Matt Zytaruk
Stefan Groschupf wrote:
Looks like a problem with the tcp ip communication.
Any firewalls running on the boxes? May any ports closed?
Are the dns names correct configured?
Is your job tracker running stable?
Stefan
Am 13.12.2005 um 19:46 schrieb Matt Zytaruk:
Hello all, I've been trying to parse a segment of data
(probably around 500k pages) I previously fetched, and
everytime I try, I get an error. Below is the error given by
the slaves. The master gives a similar error. This usually
happens late in the reduce phase, but has also happened during
the map phase once. Any ideas what might be going on here?
Network issues? bugs in the tracker?
Thanks for any help you might be able to give.
-matt zytaruk
Slaves:
060102 200647 task_m_bvkze5 Child Error
java.io.IOException: Task process exit with nonzero status.
at org.apache.nutch.mapred.TaskRunner.runChild
(TaskRunner.java:139)
at org.apache.nutch.mapred.TaskRunner.run
(TaskRunner.java:92)
060102 200833 task_m_bvkze5 done; removing files.
060102 200855 Client connection to 64.141.15.126:8050: closing
java.lang.reflect.UndeclaredThrowableException
at $Proxy0.pollForClosedTask(Unknown Source)
at org.apache.nutch.mapred.TaskTracker.offerService
(TaskTracker.java:241)
at org.apache.nutch.mapred.TaskTracker.run
(TaskTracker.java: 268)
at org.apache.nutch.mapred.TaskTracker.main
(TaskTracker.java: 633)
Caused by: java.io.IOException: timed out waiting for response
at org.apache.nutch.ipc.Client.call(Client.java:296)
at org.apache.nutch.ipc.RPC$Invoker.invoke(RPC.java:127)
... 4 more
060102 201229 Lost connection to JobTracker [crawler-
d-01.internal.wavefire.ca/64.141.15.126:8050]. Retrying...
Master:
Exception in thread "main"
java.lang.reflect.UndeclaredThrowableException
at $Proxy0.getJobStatus(Unknown Source)
at org.apache.nutch.mapred.JobClient.getJob
(JobClient.java: 272)
at org.apache.nutch.mapred.JobClient.runJob
(JobClient.java: 295)
at org.apache.nutch.crawl.ParseSegment.parse
(ParseSegment.java:91)
at org.apache.nutch.crawl.ParseSegment.main
(ParseSegment.java:110)
Caused by: java.io.IOException: timed out waiting for response
at org.apache.nutch.ipc.Client.call(Client.java:296)
at org.apache.nutch.ipc.RPC$Invoker.invoke(RPC.java:127)
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