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https://issues.apache.org/jira/browse/GIRAPH-112?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13174658#comment-13174658
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jirapos...@reviews.apache.org commented on GIRAPH-112:
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Ship it!
Good catch, this looks great, thanks!
- Jake
On 2011-12-21 07:50:20, Avery Ching wrote:
bq.
bq. -----------------------------------------------------------
bq. This is an automatically generated e-mail. To reply, visit:
bq. https://reviews.apache.org/r/3287/
bq. -----------------------------------------------------------
bq.
bq. (Updated 2011-12-21 07:50:20)
bq.
bq.
bq. Review request for giraph.
bq.
bq.
bq. Summary
bq. -------
bq.
bq. As pointed out by YuanYua, the array returned by elements() cannot have
its length used since the array contains all the elements currently stored in
the mahout collections, even including invalid elements between size and
capacity.
bq.
bq. Whenever possible I converted elements() into forEach(), forEachKey(),
forEachPair(). Used size() in other cases.
bq.
bq. Fixed some formatting violations as well in
LongDoubleFloatDoubleVertex.java.
bq.
bq.
bq. This addresses bug GIRAPH-112.
bq. https://issues.apache.org/jira/browse/GIRAPH-112
bq.
bq.
bq. Diffs
bq. -----
bq.
bq.
http://svn.apache.org/repos/asf/incubator/giraph/trunk/src/main/java/org/apache/giraph/graph/LongDoubleFloatDoubleVertex.java
1221634
bq.
bq. Diff: https://reviews.apache.org/r/3287/diff
bq.
bq.
bq. Testing
bq. -------
bq.
bq. Local unittests and MR unittests.
bq.
bq.
bq. Thanks,
bq.
bq. Avery
bq.
bq.
> Use elements() properly in LongDoubleFloatDoubleVertex
> ------------------------------------------------------
>
> Key: GIRAPH-112
> URL: https://issues.apache.org/jira/browse/GIRAPH-112
> Project: Giraph
> Issue Type: Bug
> Components: graph
> Affects Versions: 0.70.0
> Environment: Any
> Reporter: Yuanyuan Tian
> Fix For: 0.70.0
>
> Attachments: GIRAPH-112.patch
>
> Original Estimate: 5m
> Remaining Estimate: 5m
>
> I found a bug in LongDoubleFloatDoubleVertex.write(DataOutput out) when
> running a small graph algorithm. The symptom is that a vertex read from a
> different worker becomes junk after the RPC communication. And the source of
> the problem is the writing of the messages in
> LongDoubleFloatDoubleVertex.write(DataOutput out):
> for(double msg : messageList.elements()) {
> out.writeDouble(msg);
> }
> Here messageList.elements() will returns all the elements currently stored in
> the mahout DoubleArrayList, even including invalid elements between size and
> capacity. Therefore, the write() function will write a bunch of invalid
> messages, which will cause error when reading them back in readfields().
> The following is a simple solution:
> double[] elements=messageList.elements();
> for(int i=0; i<messageList.size(); i++) {
> out.writeDouble(elements[i]);
> }
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