Amani created GIRAPH-234:
-----------------------------
Summary: Error: GC overhead limit exceeded. Child Error
org.apache.hadoop.mapred.TaskRunner.run
Key: GIRAPH-234
URL: https://issues.apache.org/jira/browse/GIRAPH-234
Project: Giraph
Issue Type: Bug
Components: bsp, examples, mapreduce
Affects Versions: 0.1.0
Reporter: Amani
Hello everyone,
I'm trying to run pregel style implementation of strongly connected components
algorithm on top of giraph. A user defined writable (LongPairWritable) used as
the type of the messages between the vertices. The algorithm works well in
single node. However, whenever I tested using large graph (around 1 million
vertices) in cluster, a GC overhead limit exceeded caused by out of memory
exception. The error comes after attempt=0 super-step=1 with 2 minutes pending.
I'm wondering how to solve the problem and what causes it?
Is it possible that LongPairWritable cause the problem?
I tried a simple test:
Succeeded job:
Comput(Iterator<LongPairWritable> msgIterator){
If(getSuperstep() >=20){
voteToHalt();
} else {
//Do nothing
}
}
Failed job:
Comput(Iterator<LongPairWritable> msgIterator){
If(getSuperstep() >=20){
voteToHalt();
} else {
sendToAll(new LongPairWritable(new LongWritable(0),new LongWritable(0));
}
}
Thanks in advance.
Amani
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