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From "Hongze Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4884) Drill produced IOB exception while querying data of 65536 limitation using non batched reader
Date Fri, 09 Sep 2016 08:16:21 GMT
Hongze Zhang created DRILL-4884:
-----------------------------------

             Summary: Drill produced IOB exception while querying data of 65536 limitation
using non batched reader
                 Key: DRILL-4884
                 URL: https://issues.apache.org/jira/browse/DRILL-4884
             Project: Apache Drill
          Issue Type: Bug
          Components: Functions - Drill
    Affects Versions: 1.8.0
         Environment: CentOS 6.5 / JAVA 8
            Reporter: Hongze Zhang


Drill produces IOB while using a non batched scanner and limiting SQL by 65536.

SQL:
{noformat}
select id from isearch.tmall_auction_cluster limit 1 offset 65535
{noformat}

Result:
{noformat}
	at org.apache.drill.common.exceptions.UserException$Builder.build(UserException.java:534)
~[classes/:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor.sendFinalState(FragmentExecutor.java:324)
[classes/:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor.cleanup(FragmentExecutor.java:184)
[classes/:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:290) [classes/:na]
	at org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38) [classes/:na]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_101]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101]
	at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
Caused by: java.lang.IndexOutOfBoundsException: index: 131072, length: 2 (expected: range(0,
131072))
	at io.netty.buffer.DrillBuf.checkIndexD(DrillBuf.java:175) ~[classes/:4.0.27.Final]
	at io.netty.buffer.DrillBuf.chk(DrillBuf.java:197) ~[classes/:4.0.27.Final]
	at io.netty.buffer.DrillBuf.setChar(DrillBuf.java:517) ~[classes/:4.0.27.Final]
	at org.apache.drill.exec.record.selection.SelectionVector2.setIndex(SelectionVector2.java:79)
~[classes/:na]
	at org.apache.drill.exec.physical.impl.limit.LimitRecordBatch.limitWithNoSV(LimitRecordBatch.java:167)
~[classes/:na]
	at org.apache.drill.exec.physical.impl.limit.LimitRecordBatch.doWork(LimitRecordBatch.java:145)
~[classes/:na]
	at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:93)
~[classes/:na]
	at org.apache.drill.exec.physical.impl.limit.LimitRecordBatch.innerNext(LimitRecordBatch.java:115)
~[classes/:na]
	at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162) ~[classes/:na]
	at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:215)
~[classes/:na]
	at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:119) ~[classes/:na]
	at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:109) ~[classes/:na]
	at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:51)
~[classes/:na]
	at org.apache.drill.exec.physical.impl.svremover.RemovingRecordBatch.innerNext(RemovingRecordBatch.java:94)
~[classes/:na]
	at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162) ~[classes/:na]
	at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:215)
~[classes/:na]
	at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:119) ~[classes/:na]
	at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:109) ~[classes/:na]
	at org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:51)
~[classes/:na]
	at org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:132)
~[classes/:na]
	at org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162) ~[classes/:na]
	at org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:215)
~[classes/:na]
	at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:104) ~[classes/:na]
	at org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:81)
~[classes/:na]
	at org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:94) ~[classes/:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:256)
~[classes/:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:250)
~[classes/:na]
	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.8.0_101]
	at javax.security.auth.Subject.doAs(Subject.java:422) ~[na:1.8.0_101]
	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657) ~[hadoop-common-2.7.1.jar:na]
	at org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:250) [classes/:na]
	... 4 common frames omitted
{noformat}

Code from IteratorValidatorBatchIterator.java said that it is OK incoming returning 65536
records:

{noformat}
if (incoming.getRecordCount() > MAX_BATCH_SIZE) { // MAX_BATCH_SIZE == 65536
          throw new IllegalStateException(
              String.format(
                  "Incoming batch [#%d, %s] has size %d, which is beyond the"
                  + " limit of %d",
                  instNum, batchTypeName, incoming.getRecordCount(), MAX_BATCH_SIZE
                  ));
        }
{noformat}

Code from LimitRecordBatch.java said that a loop will not break as expected when the incoming
returns 65536 records:
{noformat}
  private void limitWithNoSV(int recordCount) {
    final int offset = Math.max(0, Math.min(recordCount - 1, recordsToSkip));
    recordsToSkip -= offset;
    int fetch;

    if(noEndLimit) {
      fetch = recordCount;
    } else {
      fetch = Math.min(recordCount, offset + recordsLeft);
      recordsLeft -= Math.max(0, fetch - offset);
    }

    int svIndex = 0;
    for(char i = (char) offset; i < fetch; svIndex++, i++) { // since fetch==recordCount==65536,
param i can be increased from 65535 to 65536, then be casted to char type of value 0, the
loop abnormally continues.
      outgoingSv.setIndex(svIndex, i);
    }
    outgoingSv.setRecordCount(svIndex);
  }
{noformat}

The IllegalStateException should be thrown when incoming returns 65535 records rather than
65536.



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