jean carlo rivera ura created TEZ-3451:
------------------------------------------
Summary: select count(*) fails with tez over cassandra
Key: TEZ-3451
URL: https://issues.apache.org/jira/browse/TEZ-3451
Project: Apache Tez
Issue Type: Bug
Affects Versions: 0.7.0
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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