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From 이성일 <si503....@samsung.com>
Subject I found 2 kind of bugs of Rexster
Date Tue, 29 Jul 2014 04:59:59 GMT
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Hi, All.</div>
<div>&nbsp;</div>
<div>I'm using Giraph and Titan with Rexster.</div>
<div>I found 2 kind of bugs of Rexster.</div>
<div>&nbsp;</div>
<div>First, when Rexster reads data from titan.</div>
<div>For example, I want to read vertex 1 to 10, but rexster return 1 to end of index.</div>
<div>I fixed this bug like below</div>
<div><pre style="color: rgb(0, 0, 0); text-transform: none; line-height: normal;
text-indent: 0px; letter-spacing: normal; font-style: normal; font-variant: normal; font-weight:
normal; word-spacing: 0px; white-space: pre-wrap; word-wrap: break-word; -webkit-text-stroke-width:
0px;">giraph-rexster/giraph-kibble/src/main/java/org/apache/giraph/rexster/kibble/IteratorVertex.java<br
/></pre><pre style="color: rgb(0, 0, 0); text-transform: none; line-height: normal;
text-indent: 0px; letter-spacing: normal; font-style: normal; font-variant: normal; font-weight:
normal; word-spacing: 0px; white-space: pre-wrap; word-wrap: break-word; -webkit-text-stroke-width:
0px;">     if (counter &gt;= this.start &amp;&amp; counter &lt; this.end)
{
+      counter += 1;
       return vertices.next();
     } </pre></div>
<div>&nbsp;</div>
<div><font face="Courier New" /><pre style="color: rgb(0, 0, 0); text-transform:
none; line-height: normal; text-indent: 0px; letter-spacing: normal; font-style: normal; font-variant:
normal; font-weight: normal; word-spacing: 0px; white-space: pre-wrap; word-wrap: break-word;
-webkit-text-stroke-width: 0px;"><br class="Apple-interchange-newline" /></pre></div>
<div>Second, when Giraph reads data from Titan via Rexster.</div>
<div>Giraph can't read whole data from Titan.</div>
<div>Because Rexster split the data to chuck as many as number of map tasks.</div>
<div>But Giraph use map tasks - 1 workers (one for master), except SplitMasterWorker=false
option used.</div>
<div>So, Giraph miss 1 chuck.</div>
<div>&nbsp;</div>
<div>Actually, I also&nbsp;made&nbsp;patch for this bug.</div>
<div>&nbsp;</div>
<div>I can't found issue for this bug on JIRA.</div>
<div>Can I create issue on JIRA for this? and attach files?</div>
<div>&nbsp;</div>
<div>&nbsp;</div>
<div>Best Regards,</div>
<div>Seong-il.</div>
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