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https://issues.apache.org/jira/browse/HIVE-14857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15532983#comment-15532983
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Hitesh Shah commented on HIVE-14857:
------------------------------------
[~carlo_4002] I just moved this to Hive. Can you please update the affects
version field to indicate what versions of Hive and Tez you were running.
> select count(*) fails with tez over cassandra
> ---------------------------------------------
>
> Key: HIVE-14857
> URL: https://issues.apache.org/jira/browse/HIVE-14857
> Project: Hive
> Issue Type: Bug
> Reporter: jean carlo rivera ura
>
> Hello,
> We have a cluster with nodes having cassandra and hadoop (hortonworks 2.3.2)
> and we have tez as our engine by default.
> I have a table in cassandra, and I use the driver hive-cassandra to do
> selects over it. This is the table
> {code:sql}
> CREATE TABLE table1 ( campaign_id text, sid text, name text, ts timestamp,
> PRIMARY KEY (campaign_id, sid) ) WITH CLUSTERING ORDER BY (sid ASC)
> {code}
> And I have only 3 partitions
> ||campaign_id || sid || name || ts||
> |45sqdqs | sqsd | dea | NULL|
> |QSHJKA | sqsd | dea | NULL|
> |45s-qs | sqsd | dea | NULL|
> At the moment to do a "select count ( * )" over table using hive like that
> (tez is our engine by default)
> {code} hive -e "select count(*) from table1;" {code}
> I got this error:
> {code}
> Status: Failed
> Vertex failed, vertexName=Map 1,
> vertexId=vertex_1474275943985_0179_1_00, diagnostics=[Task failed,
> taskId=task_1474275943985_0179_1_00_000001, diagnostics=[TaskAttempt 0
> failed, info=[Error: Failure while running
> task:java.lang.RuntimeException:
> org.apache.tez.dag.api.TezUncheckedException: Expected length: 12416
> actual length: 9223372036854775711
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:171)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.run(TezProcessor.java:137)
> at
> org.apache.tez.runtime.LogicalIOProcessorRuntimeTask.run(LogicalIOProcessorRuntimeTask.java:344)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:179)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable$1.run(TezTaskRunner.java:171)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:171)
> at
> org.apache.tez.runtime.task.TezTaskRunner$TaskRunnerCallable.callInternal(TezTaskRunner.java:167)
> at org.apache.tez.common.CallableWithNdc.call(CallableWithNdc.java:36)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: org.apache.tez.dag.api.TezUncheckedException: Expected length:
> 12416 actual length: 9223372036854775711
> at
> org.apache.hadoop.mapred.split.TezGroupedSplit.readFields(TezGroupedSplit.java:128)
> at
> org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:71)
> at
> org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:42)
> at
> org.apache.tez.mapreduce.hadoop.MRInputHelpers.createOldFormatSplitFromUserPayload(MRInputHelpers.java:177)
> at
> org.apache.tez.mapreduce.lib.MRInputUtils.getOldSplitDetailsFromEvent(MRInputUtils.java:136)
> at
> org.apache.tez.mapreduce.input.MRInput.initFromEventInternal(MRInput.java:643)
> at org.apache.tez.mapreduce.input.MRInput.initFromEvent(MRInput.java:621)
> at
> org.apache.tez.mapreduce.input.MRInputLegacy.checkAndAwaitRecordReaderInitialization(MRInputLegacy.java:145)
> at
> org.apache.tez.mapreduce.input.MRInputLegacy.init(MRInputLegacy.java:109)
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.getMRInput(MapRecordProcessor.java:390)
> at
> org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.init(MapRecordProcessor.java:128)
> at
> org.apache.hadoop.hive.ql.exec.tez.TezProcessor.initializeAndRunProcessor(TezProcessor.java:147)
> ... 14 more
> {code}
> So far I understand, in readfields we are getting more data that we are
> expecting. But considering the size of the table( only 3 records), I dont
> think the data is a problem.
> Another thing to add is that if I do a "select *", it works perfectly fine
> with tez. Using the engine mp, select count ( * ) and select * work fine as
> well.
> We are using hortonworks version 2.3.2
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