Hi Carmen,
I think the ChildError is being thrown by Hadoop but the root cause is this
NPE within the BspServiceMaster. Unfortunately, I have not seen this
exception situation and am not sure why you are getting the NPE. It may be
a data issue. Quick question--have you gotten the examples like
SimpleShortestPath to run? Please confirm, thanks.
--John
On Wed, Jul 2, 2014 at 9:53 AM, Carmen Manzulli <carmenmanzu...@gmail.com>
wrote:
> i've red in the web that "error child" could mean this:
> Possible reason: the memory allocated for the tasks trackers (sum of
> mapred.*.child.java.opt in mapred-site.xml) is more than the nodes actual
> memory .
>
>
> 2014-07-02 15:52 GMT+02:00 Carmen Manzulli <carmenmanzu...@gmail.com>:
>
> ok course :) !
>>
>> java.lang.Throwable: Child Error
>> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
>> Caused by: java.io.IOException: Task process exit with nonzero status of 1.
>> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)
>>
>> and from the command line:
>>
>>
>> /../lib/commons-beanutils-1.7.0.jar:/usr/local/hadoop/libexec/../lib/commons-beanutils-core-1.8.0.jar:/usr/local/hadoop/libexec/../lib/commons-cli-1.2.jar:/usr/local/hadoop/libexec/../lib/commons-codec-1.4.jar:/usr/local/hadoop/libexec/../lib/commons-collections-3.2.1.jar:/usr/local/hadoop/libexec/../lib/commons-configuration-1.6.jar:/usr/local/hadoop/libexec/../lib/commons-daemon-1.0.1.jar:/usr/local/hadoop/libexec/../lib/commons-digester-1.8.jar:/usr/local/hadoop/libexec/../lib/commons-el-1.0.jar:/usr/local/hadoop/libexec/../lib/commons-httpclient-3.0.1.jar:/usr/local/hadoop/libexec/../lib/commons-io-2.1.jar:/usr/local/hadoop/libexec/../lib/commons-lang-2.4.jar:/usr/local/hadoop/libexec/../lib/commons-logging-1.1.1.jar:/usr/local/hadoop/libexec/../lib/commons-logging-api-1.0.4.jar:/usr/local/hadoop/libexec/../lib/commons-math-2.1.jar:/usr/local/hadoop/libexec/../lib/commons-net-3.1.jar:/usr/local/hadoop/libexec/../lib/core-3.1.1.jar:/usr/local/hadoop/libexec/../lib/hadoop-capacity-scheduler-1.2.1.jar:/usr/local/hadoop/libexec/../lib/hadoop-fairscheduler-1.2.1.jar:/usr/local/hadoop/libexec/../lib/hadoop-thriftfs-1.2.1.jar:/usr/local/hadoop/libexec/../lib/hsqldb-1.8.0.10.jar:/usr/local/hadoop/libexec/../lib/jackson-core-asl-1.8.8.jar:/usr/local/hadoop/libexec/../lib/jackson-mapper-asl-1.8.8.jar:/usr/local/hadoop/libexec/../lib/jasper-compiler-5.5.12.jar:/usr/local/hadoop/libexec/../lib/jasper-runtime-5.5.12.jar:/usr/local/hadoop/libexec/../lib/jdeb-0.8.jar:/usr/local/hadoop/libexec/../lib/jersey-core-1.8.jar:/usr/local/hadoop/libexec/../lib/jersey-json-1.8.jar:/usr/local/hadoop/libexec/../lib/jersey-server-1.8.jar:/usr/local/hadoop/libexec/../lib/jets3t-0.6.1.jar:/usr/local/hadoop/libexec/../lib/jetty-6.1.26.jar:/usr/local/hadoop/libexec/../lib/jetty-util-6.1.26.jar:/usr/local/hadoop/libexec/../lib/jsch-0.1.42.jar:/usr/local/hadoop/libexec/../lib/junit-4.5.jar:/usr/local/hadoop/libexec/../lib/kfs-0.2.2.jar:/usr/local/hadoop/libexec/../lib/log4j-1.2.15.jar:/usr/local/hadoop/libexec/../lib/mockito-all-1.8.5.jar:/usr/local/hadoop/libexec/../lib/oro-2.0.8.jar:/usr/local/hadoop/libexec/../lib/servlet-api-2.5-20081211.jar:/usr/local/hadoop/libexec/../lib/slf4j-api-1.4.3.jar:/usr/local/hadoop/libexec/../lib/slf4j-log4j12-1.4.3.jar:/usr/local/hadoop/libexec/../lib/xmlenc-0.52.jar:/usr/local/hadoop/libexec/../lib/jsp-2.1/jsp-2.1.jar:/usr/local/hadoop/libexec/../lib/jsp-2.1/jsp-api-2.1.jar
>> 2014-07-02 15:49:17,492 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:java.library.path=/usr/local/hadoop/libexec/../lib/native/Linux-amd64-64:/app/hadoop/tmp/mapred/local/taskTracker/hduser/jobcache/job_201407021315_0003/attempt_201407021315_0003_m_000000_0/work
>> 2014-07-02 15:49:17,492 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:java.io.tmpdir=/app/hadoop/tmp/mapred/local/taskTracker/hduser/jobcache/job_201407021315_0003/attempt_201407021315_0003_m_000000_0/work/tmp
>> 2014-07-02 15:49:17,492 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:java.compiler=<NA>
>> 2014-07-02 15:49:17,492 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:os.name=Linux
>> 2014-07-02 15:49:17,492 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:os.arch=amd64
>> 2014-07-02 15:49:17,492 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:os.version=3.11.0-24-generic
>> 2014-07-02 15:49:17,493 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:user.name=hduser
>> 2014-07-02 15:49:17,493 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:user.home=/home/hduser
>> 2014-07-02 15:49:17,493 INFO org.apache.zookeeper.ZooKeeper: Client
>> environment:user.dir=/app/hadoop/tmp/mapred/local/taskTracker/hduser/jobcache/job_201407021315_0003/attempt_201407021315_0003_m_000000_0/work
>> 2014-07-02 15:49:17,493 INFO org.apache.zookeeper.ZooKeeper: Initiating
>> client connection, connectString=carmen-HP-Pavilion-Sleekbook-15:22181
>> sessionTimeout=60000
>> watcher=org.apache.giraph.master.BspServiceMaster@465962c4
>> 2014-07-02 15:49:17,509 INFO org.apache.zookeeper.ClientCnxn: Opening socket
>> connection to server carmen-HP-Pavilion-Sleekbook-15/127.0.1.1:22181. Will
>> not attempt to authenticate using SASL (unknown error)
>> 2014-07-02 15:49:17,509 INFO org.apache.zookeeper.ClientCnxn: Socket
>> connection established to carmen-HP-Pavilion-Sleekbook-15/127.0.1.1:22181,
>> initiating session
>> 2014-07-02 15:49:17,515 INFO org.apache.zookeeper.ClientCnxn: Session
>> establishment complete on server
>> carmen-HP-Pavilion-Sleekbook-15/127.0.1.1:22181, sessionid =
>> 0x146f756106b0001, negotiated timeout = 600000
>> 2014-07-02 15:49:17,516 INFO org.apache.giraph.bsp.BspService: process:
>> Asynchronous connection complete.
>> 2014-07-02 15:49:17,530 INFO org.apache.giraph.graph.GraphTaskManager: map:
>> No need to do anything when not a worker
>> 2014-07-02 15:49:17,530 INFO org.apache.giraph.graph.GraphTaskManager:
>> cleanup: Starting for MASTER_ZOOKEEPER_ONLY
>> 2014-07-02 15:49:17,561 INFO org.apache.giraph.bsp.BspService: getJobState:
>> Job state already exists (/_hadoopBsp/job_201407021315_0003/_masterJobState)
>> 2014-07-02 15:49:17,568 INFO org.apache.giraph.master.BspServiceMaster:
>> becomeMaster: First child is
>> '/_hadoopBsp/job_201407021315_0003/_masterElectionDir/carmen-HP-Pavilion-Sleekbook-15_00000000000'
>> and my bid is
>> '/_hadoopBsp/job_201407021315_0003/_masterElectionDir/carmen-HP-Pavilion-Sleekbook-15_00000000000'
>> 2014-07-02 15:49:17,570 INFO org.apache.giraph.bsp.BspService:
>> getApplicationAttempt: Node
>> /_hadoopBsp/job_201407021315_0003/_applicationAttemptsDir already exists!
>> 2014-07-02 15:49:17,625 INFO org.apache.giraph.comm.netty.NettyServer:
>> NettyServer: Using execution group with 8 threads for requestFrameDecoder.
>> 2014-07-02 15:49:17,674 INFO org.apache.giraph.comm.netty.NettyServer:
>> start: Started server communication server:
>> carmen-HP-Pavilion-Sleekbook-15/127.0.1.1:30000 with up to 16 threads on
>> bind attempt 0 with sendBufferSize = 32768 receiveBufferSize = 524288
>> 2014-07-02 15:49:17,679 INFO org.apache.giraph.comm.netty.NettyClient:
>> NettyClient: Using execution handler with 8 threads after request-encoder.
>> 2014-07-02 15:49:17,682 INFO org.apache.giraph.master.BspServiceMaster:
>> becomeMaster: I am now the master!
>> 2014-07-02 15:49:17,684 INFO org.apache.giraph.bsp.BspService:
>> getApplicationAttempt: Node
>> /_hadoopBsp/job_201407021315_0003/_applicationAttemptsDir already exists!
>> 2014-07-02 15:49:17,717 ERROR org.apache.giraph.master.MasterThread:
>> masterThread: Master algorithm failed with NullPointerException
>> java.lang.NullPointerException
>> at
>> org.apache.giraph.master.BspServiceMaster.generateInputSplits(BspServiceMaster.java:330)
>> at
>> org.apache.giraph.master.BspServiceMaster.createInputSplits(BspServiceMaster.java:619)
>> at
>> org.apache.giraph.master.BspServiceMaster.createVertexInputSplits(BspServiceMaster.java:686)
>> at org.apache.giraph.master.MasterThread.run(MasterThread.java:108)
>> 2014-07-02 15:49:17,718 FATAL org.apache.giraph.graph.GraphMapper:
>> uncaughtException: OverrideExceptionHandler on thread
>> org.apache.giraph.master.MasterThread, msg = java.lang.NullPointerException,
>> exiting...
>> java.lang.IllegalStateException: java.lang.NullPointerException
>> at org.apache.giraph.master.MasterThread.run(MasterThread.java:193)
>> Caused by: java.lang.NullPointerException
>> at
>> org.apache.giraph.master.BspServiceMaster.generateInputSplits(BspServiceMaster.java:330)
>> at
>> org.apache.giraph.master.BspServiceMaster.createInputSplits(BspServiceMaster.java:619)
>> at
>> org.apache.giraph.master.BspServiceMaster.createVertexInputSplits(BspServiceMaster.java:686)
>> at org.apache.giraph.master.MasterThread.run(MasterThread.java:108)
>> 2014-07-02 15:49:17,722 INFO org.apache.giraph.zk.ZooKeeperManager: run:
>> Shutdown hook started.
>> 2014-07-02 15:49:17,727 WARN org.apache.giraph.zk.ZooKeeperManager:
>> onlineZooKeeperServers: Forced a shutdown hook kill of the ZooKeeper process.
>> 2014-07-02 15:49:18,049 INFO org.apache.zookeeper.ClientCnxn: Unable to read
>> additional data from server sessionid 0x146f756106b0001, likely server has
>> closed socket, closing socket connection and attempting reconnect
>> 2014-07-02 15:49:18,050 INFO org.apache.giraph.zk.ZooKeeperManager:
>> onlineZooKeeperServers: ZooKeeper process exited with 143 (note that 143
>> typically means killed).
>>
>>
>>
>>
>> 2014-07-02 13:52 GMT+02:00 John Yost <soozandjohny...@gmail.com>:
>>
>> Hi Carmen,
>>>
>>> Please post more of the exception stack trace, not enough here for me to
>>> figure anything out. :)
>>>
>>> Thanks
>>>
>>> --John
>>>
>>>
>>> On Wed, Jul 2, 2014 at 7:33 AM, <soozandjohny...@gmail.com> wrote:
>>>
>>>> Hi Carmen,
>>>>
>>>> Glad that one problem is fixed, and I can take a look at this one as
>>>> well.
>>>>
>>>> --John
>>>>
>>>> Sent from my iPhone
>>>>
>>>> On Jul 2, 2014, at 6:50 AM, Carmen Manzulli <carmenmanzu...@gmail.com>
>>>> wrote:
>>>>
>>>>
>>>> ok; i've done what you have told me...but now i've got this problem..
>>>>
>>>> ava.lang.Throwable: Child Error
>>>> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:271)
>>>> Caused by: java.io.IOException: Task process exit with nonzero status of 1.
>>>> at org.apache.hadoop.mapred.TaskRunner.run(TaskRunner.java:258)
>>>>
>>>> this is my Computation code:
>>>> import org.apache.giraph.GiraphRunner;
>>>> import org.apache.giraph.graph.BasicComputation;
>>>> import org.apache.giraph.graph.Vertex;
>>>> import org.apache.giraph.edge.Edge;
>>>>
>>>>
>>>>
>>>>
>>>> import org.apache.hadoop.io.Text;
>>>> import org.apache.hadoop.io.NullWritable;
>>>> import org.apache.hadoop.util.ToolRunner;
>>>>
>>>>
>>>>
>>>> public class SimpleSelectionComputation extends
>>>> BasicComputation<Text,NullWritable,Text,NullWritable> {
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> @Override
>>>> public void compute(Vertex<Text,NullWritable,Text>
>>>> vertex,Iterable<NullWritable> messages){
>>>>
>>>>
>>>> Text source = new Text("http://dbpedia.org/resource/1040s";);
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> if (getSuperstep()==0)
>>>> {
>>>> if(vertex.getId()==source)
>>>> {
>>>> System.out.println("il soggetto "+vertex.getId()+" ha i
>>>> seguenti predicati e oggetti:");
>>>> for(Edge<Text,Text> e : vertex.getEdges())
>>>>
>>>>
>>>>
>>>>
>>>> {
>>>>
>>>> System.out.println(e.getValue()+"\t"+e.getTargetVertexId());
>>>> }
>>>> }
>>>> vertex.voteToHalt();
>>>> }
>>>>
>>>> }
>>>>
>>>> public static void main(String[] args) throws Exception {
>>>> System.exit(ToolRunner.run(new GiraphRunner(), args));
>>>>
>>>>
>>>>
>>>>
>>>> }
>>>>
>>>>
>>>> }
>>>>
>>>>
>>>
>>
>
