eaugene opened a new pull request, #12244:
URL: https://github.com/apache/pinot/pull/12244
[bugfix]
we recently encountered an error :
```
java.lang.ArrayIndexOutOfBoundsException: Index 349 out of bounds for
length 349
at
org.apache.pinot.segment.local.realtime.impl.forward.FixedByteMVMutableForwardIndex.getLongMV(FixedByteMVMutableForwardIndex.java:294)
at
org.apache.pinot.segment.spi.index.mutable.MutableForwardIndex.getLongMV(MutableForwardIndex.java:492)
at
org.apache.pinot.core.operator.dociditerators.MVScanDocIdIterator$LongMatcher.doesValueMatch(MVScanDocIdIterator.java:201)
at
org.apache.pinot.core.operator.dociditerators.MVScanDocIdIterator.applyAnd(MVScanDocIdIterator.java:104)
at
org.apache.pinot.core.operator.dociditerators.ScanBasedDocIdIterator.applyAnd(ScanBasedDocIdIterator.java:48)
at
org.apache.pinot.core.operator.docidsets.AndDocIdSet.iterator(AndDocIdSet.java:151)
at
org.apache.pinot.core.operator.docidsets.AndDocIdSet.iterator(AndDocIdSet.java:78)
at
org.apache.pinot.core.operator.docidsets.NotDocIdSet.iterator(NotDocIdSet.java:37)
at
org.apache.pinot.core.operator.docidsets.AndDocIdSet.iterator(AndDocIdSet.java:78)
at
org.apache.pinot.core.operator.DocIdSetOperator.getNextBlock(DocIdSetOperator.java:67)
at
org.apache.pinot.core.operator.DocIdSetOperator.getNextBlock(DocIdSetOperator.java:39)
at
org.apache.pinot.core.operator.BaseOperator.nextBlock(BaseOperator.java:43)
at
org.apache.pinot.core.operator.ProjectionOperator.getNextBlock(ProjectionOperator.java:70)
at
org.apache.pinot.core.operator.ProjectionOperator.getNextBlock(ProjectionOperator.java:37)
at
org.apache.pinot.core.operator.BaseOperator.nextBlock(BaseOperator.java:43)
at
org.apache.pinot.core.operator.query.GroupByOperator.getNextBlock(GroupByOperator.java:105)
at
org.apache.pinot.core.operator.query.GroupByOperator.getNextBlock(GroupByOperator.java:46)
at
org.apache.pinot.core.operator.BaseOperator.nextBlock(BaseOperator.java:43)
at
org.apache.pinot.core.operator.combine.GroupByCombineOperator.processSegments(GroupByCombineOperator.java:133)
at
org.apache.pinot.core.operator.combine.BaseCombineOperator$1.runJob(BaseCombineOperator.java:121)
at
org.apache.pinot.core.util.trace.TraceRunnable.run(TraceRunnable.java:40)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at
com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:125)
at
com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:57)
at
com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:78)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
```
This patch fixes it by reading only till the available size in the passed
buffer array .
I think the cause can be MutubaleDataSource._maxNumValuesPerMVEntry ( which
is used to intialize the size of buffer array ) value updation may not be
Atomic
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