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https://issues.apache.org/jira/browse/DRILL-5157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15771786#comment-15771786
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Paul Rogers commented on DRILL-5157:
------------------------------------
There are really two errors here.
First is that the Snappy library is not available on the Mac where I ran the
tests. See:
http://stackoverflow.com/questions/15158405/unable-to-load-native-hadoop-library-for-mac-os-x
It seems that the Parquet file being read was encoded with Snappy, and so the
Snappy library is required.
The solution to this is to describe how to obtain the library, or find some
Java alternative when Snappy is not available.
The second error is that the error caused a memory leak. In general, we'd like
errors, even those like the above, to clean up memory to avoid putting the
Drillbit into a bad state.
> TestDrillbitResilience.doMemoryLeaksWhenCancelled fails with Parquet async
> Snappy error
> ---------------------------------------------------------------------------------------
>
> Key: DRILL-5157
> URL: https://issues.apache.org/jira/browse/DRILL-5157
> Project: Apache Drill
> Issue Type: Bug
> Affects Versions: 1.9.0
> Reporter: Paul Rogers
>
> Run the {{TestDrillbitResilience.doMemoryLeaksWhenCancelled}} unit test. It
> fails with the following stack trace and the memory leak trace shown second.
> Strangely, this error appears only if the test is run as part of the overall
> suite. The error does not appear if the test is run individually in the
> debugger.
> Stack trace that seems to show that the code was trying to find a Snappy
> native library:
> {code}
> java.lang.reflect.InvocationTargetException
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.xerial.snappy.SnappyLoader.loadNativeLibrary(SnappyLoader.java:317)
> at org.xerial.snappy.SnappyLoader.load(SnappyLoader.java:219)
> at org.xerial.snappy.Snappy.<clinit>(Snappy.java:44)
> at
> org.apache.drill.exec.store.parquet.columnreaders.AsyncPageReader$DecompressionHelper.decompress(AsyncPageReader.java:402)
> at
> org.apache.drill.exec.store.parquet.columnreaders.AsyncPageReader.decompress(AsyncPageReader.java:169)
> at
> org.apache.drill.exec.store.parquet.columnreaders.AsyncPageReader.getDecompressedPageData(AsyncPageReader.java:96)
> at
> org.apache.drill.exec.store.parquet.columnreaders.AsyncPageReader.nextInternal(AsyncPageReader.java:219)
> at
> org.apache.drill.exec.store.parquet.columnreaders.PageReader.next(PageReader.java:280)
> at
> org.apache.drill.exec.store.parquet.columnreaders.ColumnReader.readPage(ColumnReader.java:250)
> at
> org.apache.drill.exec.store.parquet.columnreaders.ColumnReader.determineSize(ColumnReader.java:178)
> at
> org.apache.drill.exec.store.parquet.columnreaders.ColumnReader.processPages(ColumnReader.java:130)
> at
> org.apache.drill.exec.store.parquet.columnreaders.ParquetRecordReader.readAllFixedFieldsSerial(ParquetRecordReader.java:485)
> at
> org.apache.drill.exec.store.parquet.columnreaders.ParquetRecordReader.readAllFixedFields(ParquetRecordReader.java:479)
> at
> org.apache.drill.exec.store.parquet.columnreaders.ParquetRecordReader.next(ParquetRecordReader.java:562)
> at
> org.apache.drill.exec.physical.impl.ScanBatch.next(ScanBatch.java:178)
> at
> org.apache.drill.exec.physical.impl.validate.IteratorValidatorBatchIterator.next(IteratorValidatorBatchIterator.java:215)
> at
> org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:119)
> …
> {code}
> Resulting memory leak if the test is allowed to complete:
> {code}
> java.lang.AssertionError: Query state is incorrect (expected: CANCELED,
> actual: FAILED) AND/OR
> Exception thrown: org.apache.drill.common.exceptions.UserRemoteException:
> SYSTEM ERROR: IllegalStateException: Allocator[op:3:0:15:ParquetRowGroupScan]
> closed with outstanding buffers allocated (2).
> Allocator(op:3:0:15:ParquetRowGroupScan) 1000000/393216/3162112/10000000000
> (res/actual/peak/limit)
> child allocators: 0
> ledgers: 2
> ledger[3407] allocator: op:3:0:15:ParquetRowGroupScan), isOwning: true,
> size: 131072, references: 1, life: 73148192887288..0, allocatorManager:
> [3027, life: 73148192235794..0] holds 1 buffers.
> DrillBuf[4949], udle: [3028 0..131072]
> ledger[3471] allocator: op:3:0:15:ParquetRowGroupScan), isOwning: true,
> size: 262144, references: 1, life: 73148451288840..0, allocatorManager:
> [3091, life: 73148451257480..0] holds 1 buffers.
> DrillBuf[5017], udle: [3092 0..262144]
> reservations: 0
> Fragment 3:0
> [Error Id: 8502074b-f488-4a14-bf7d-a2a4480392cd on 172.30.1.67:31016]
> at
> org.apache.drill.exec.server.TestDrillbitResilience.assertStateCompleted(TestDrillbitResilience.java:861)
> at
> org.apache.drill.exec.server.TestDrillbitResilience.assertCancelledWithoutException(TestDrillbitResilience.java:876)
> at
> org.apache.drill.exec.server.TestDrillbitResilience.doMemoryLeaksWhenCancelled(TestDrillbitResilience.java:680)
> at
> org.apache.drill.exec.server.TestDrillbitResilience.memoryLeaksWhenCancelled(TestDrillbitResilience.java:647)
> ...
> {code}
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