Alan Burlison created HADOOP-12630:
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Summary: Mususe of sun.misc.Unsafe causes midaligned memory access
coredumps
Key: HADOOP-12630
URL: https://issues.apache.org/jira/browse/HADOOP-12630
Project: Hadoop Common
Issue Type: Sub-task
Components: native
Affects Versions: 3.0.0
Environment: Solaris SPARC
Reporter: Alan Burlison
Assignee: Alan Burlison
Misuse of sun.misc.unsafe by {{org.apache.hadoop.io.FastByteComparisons}}
causes misaligned memory accesses and results in coredumps. Stack traces below:
{code}
hadoop-tools/hadoop-gridmix/core
--- called from signal handler with signal 10 (SIGBUS) ---
ffffffff7717fa40 Unsafe_GetLong (18c000, ffffffff7e2fd6d8, 0, 19,
ffffffff775d4be0, 10018c000) + 158
ffffffff70810dcc * sun/misc/Unsafe.getLong(Ljava/lang/Object;J)J+-30004
ffffffff70810d70 * sun/misc/Unsafe.getLong(Ljava/lang/Object;J)J+0
ffffffff70806d58 *
org/apache/hadoop/io/FastByteComparisons$LexicographicalComparerHolder$UnsafeComparer.compareTo([BII[BII)I+91
(line 405)
ffffffff70806cb4 *
org/apache/hadoop/io/FastByteComparisons$LexicographicalComparerHolder$UnsafeComparer.compareTo(Ljava/lang/Object;IILjava/lang/Object;II)I+16
(line 264)
ffffffff7080783c *
org/apache/hadoop/io/FastByteComparisons.compareTo([BII[BII)I+11 (line 92)
ffffffff70806cb4 *
org/apache/hadoop/io/WritableComparator.compareBytes([BII[BII)I+8 (line 376)
ffffffff70806cb4 *
org/apache/hadoop/mapred/gridmix/GridmixRecord$Comparator.compare([BII[BII)I+61
(line 522)
ffffffff70806cb4 *
org/apache/hadoop/mapred/gridmix/TestGridmixRecord.binSortTest(Lorg/apache/hadoop/mapred/gridmix/GridmixRecord;Lorg/apache/hadoop/mapred/gridmix/GridmixRecord;IILorg/apache/hadoop/io/WritableComparator;)V+280
(line 268)
ffffffff70806f44 *
org/apache/hadoop/mapred/gridmix/TestGridmixRecord.testBaseRecord()V+57 (line
482)
{code}
This also causes {{hadoop-mapreduce-project/hadoop-mapreduce-examples/core}}
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