Back to bug 1013001

Who When What Removed Added
Martin Gencur 2013-10-02 12:34:31 UTC Target Release --- 6.2.0
Severity unspecified high
mark yarborough 2013-10-09 13:05:12 UTC CC myarboro
Blocks 1017190
Red Hat Bugzilla 2013-11-03 23:56:47 UTC CC gsheldon
Doc Type Bug Fix Known Issue
Doc Type Known Issue Bug Fix
Alan Field 2013-11-05 14:44:14 UTC Doc Text Cause:

Consequence:

Workaround:

Result:
Doc Type Bug Fix Known Issue
Doc Text Cause:

Consequence:

Workaround:

Result: 		Cause: When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.

Consequence: When these exceptions occur, the task fails

Workaround: There are several things the user can do to try and alleviate this issue:

1) Use larger values in the cache where the Map/Reduce task is executed
2) Use a collator and/or a combiner on the Map/Reduce task if this is possible
3) Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter

Result:
Tristan Tarrant 2013-11-19 13:43:09 UTC Doc Text Cause: When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.

Consequence: When these exceptions occur 		When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.

As a result, when these exceptions occur
Doc Text , the task fails

Workaround: There are several things the user can do to try and alleviate this issue:

1) Use larger values in the cache where the Map/Reduce task is executed
2) Use a collator and/or a combiner on the Map/Reduce task if this is 		, the task fails.

There are several things the user can do to try and alleviate this issue:

1) Use larger values in the cache where the Map/Reduce task is executed
2) Use a collator and/or a combiner on the Map/Reduce task if this is possible
3)
Doc Text possible
3) Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter

Result: 		Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter
Doc Text When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.

As a result, when these exceptions occur 		When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.

As a result, when these exceptions occur
Doc Text , the task fails.

There are several things the user can do to try and alleviate this issue:

1) Use larger values in the cache where the Map/Reduce task is executed
2) Use a collator and/or a combiner on the Map/Reduce task if this is possible
3) 		, the task fails.

There are several things the user can do to try and alleviate this issue:

1) Use larger values in the cache where the Map/Reduce task is executed.
2) Use a collator and/or a combiner on the Map/Reduce task if this is
Doc Text Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter possible.
3) Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter.
Doc Text When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.

As a result, when these exceptions occur 		When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.
</para>
<para>
As a result, when these exceptions occur
Doc Text , the task fails.

There are several things the user can do to try and alleviate this issue:

1) Use larger values in the cache where the Map/Reduce task is executed.
2) Use a collator and/or a combiner on the Map/Reduce task if this is 		, the task fails.
</para>
<para>
There are several things the user can do to try and alleviate this issue:
</para>
<orderedlist>
<listitem>
<para>Use larger values in the cache where the Map/Reduce task is
Doc Text possible.
3) Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter. 		executed.
</para>
</listitem>
<listitem>
<para>Use a collator and/or a combiner on the Map/Reduce task if this is possible.</para>
</listitem>
<listitem>
<para>Configure the size of the intermediate chunks written to the cache using the state
Doc Text transfer chunkSize parameter.</para>
</listitem>
</orderedlist>
Doc Text When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.
</para>
<para>
As a result, when these exceptions occur 		When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.
</para>
<para>
As a result, when these exceptions occur
Doc Text , the task fails.
</para>
<para>
There are several things the user can do to try and alleviate this issue:
</para>
<orderedlist>
<listitem>
<para>Use larger values in the cache where the Map/Reduce task is 		, the task fails.
</para>
<para>
There are several things the user can do to try and alleviate this issue:

<orderedlist>
<listitem>
<para>Use larger values in the cache where the Map/Reduce task is
Doc Text executed.
</para>
</listitem>
<listitem>
<para>Use a collator and/or a combiner on the Map/Reduce task if this is possible.</para>
</listitem>
<listitem>
<para>Configure the size of the intermediate chunks written to the cache using the state 		executed.
</para>
</listitem>
<listitem>
<para>Use a collator and/or a combiner on the Map/Reduce task if this is possible.</para>
</listitem>
<listitem>
<para>Configure the size of the intermediate chunks written to the cache using the state
Doc Text transfer chunkSize parameter.</para>
</listitem>
</orderedlist> 		transfer chunkSize parameter.</para>
</listitem>
</orderedlist>
Doc Text When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.
</para>
<para>
As a result, when these exceptions occur 		When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.As a result, when these exceptions occur
Doc Text , the task fails.
</para>
<para>
There are several things the user can do to try and alleviate this issue:

<orderedlist>
<listitem>
<para>Use larger values in the cache where the Map/Reduce task is 		, the task fails.
</para>
<para>
There are several things the user can do to try and alleviate this issue:

<orderedlist>
<listitem>
<para>Use larger values in the cache where the Map/Reduce task is
Doc Text executed.
</para>
</listitem>
<listitem>
<para>Use a collator and/or a combiner on the Map/Reduce task if this is possible.</para>
</listitem>
<listitem>
<para>Configure the size of the intermediate chunks written to the cache using the state 		executed.
</para>
</listitem>
<listitem>
<para>Use a collator and/or a combiner on the Map/Reduce task if this is possible.</para>
</listitem>
<listitem>
<para>Configure the size of the intermediate chunks written to the cache using the state
Doc Text transfer chunkSize parameter.</para>
</listitem>
</orderedlist> 		transfer chunkSize parameter.</para>
</listitem>
</orderedlist>
Status NEW ON_QA
Target Milestone --- ER4
Alan Field 2013-12-05 20:50:09 UTC Status ON_QA ASSIGNED
Mircea Markus 2013-12-20 10:06:59 UTC CC mmarkus
Martin Gencur 2013-12-20 10:31:26 UTC Blocks 1017190
Martin Gencur 2013-12-20 10:31:50 UTC Target Release 6.2.0 6.3.0
Target Milestone ER4 ---
Misha H. Ali 2014-05-27 05:32:53 UTC CC mhusnain
Doc Text When a Map/Reduce task is executed against a cache with many small values, the task may experience TimeoutExceptions while trying to write the intermediate results to the cache.As a result, when these exceptions occur, the task fails.
</para>
<para>
There are several things the user can do to try and alleviate this issue:

<orderedlist>
<listitem>
<para>Use larger values in the cache where the Map/Reduce task is executed.
</para>
</listitem>
<listitem>
<para>Use a collator and/or a combiner on the Map/Reduce task if this is possible.</para>
</listitem>
<listitem>
<para>Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter.</para>
</listitem>
</orderedlist> 		<para>
When a Map/Reduce task is executed against a cache with many small values, the task may experience <literal>TimeoutExceptions</literal> when writing the intermediate results to the cache. As a result, when these exceptions occur, the task fails.
</para>
<para>
Several workarounds are available for this issue, including:
<orderedlist>
<listitem>
<para>
Use larger values in the cache where the Map/Reduce task is executed.
</para>
</listitem>
<listitem>
<para>
Use a collator and/or a combiner on the Map/Reduce task if this is possible.
</para>
</listitem>
<listitem>
<para>
Configure the size of the intermediate chunks written to the cache using the state transfer chunkSize parameter.
</para>
</listitem>
</orderedlist>
</para>
</listitem>
Jiri Pallich 2014-06-04 12:48:59 UTC Blocks 1104639
Divya Mehra 2014-06-04 17:06:21 UTC CC dmehra
Alan Field 2014-06-10 12:00:18 UTC Status ASSIGNED VERIFIED
John Skeoch 2014-11-30 21:15:57 UTC CC mmarkus sjacobs
Dave Stahl 2015-01-26 14:05:48 UTC Status VERIFIED CLOSED
Resolution --- CURRENTRELEASE
Last Closed 2015-01-26 09:05:48 UTC

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