Ivan Mitic created HADOOP-12033:
-----------------------------------
Summary: Reducer task failure with java.lang.NoClassDefFoundError:
Ljava/lang/InternalError at
org.apache.hadoop.io.compress.snappy.SnappyDecompressor.decompressBytesDirect
Key: HADOOP-12033
URL: https://issues.apache.org/jira/browse/HADOOP-12033
Project: Hadoop Common
Issue Type: Bug
Reporter: Ivan Mitic
We have noticed intermittent reducer task failures with the below exception:
{code}
Error: org.apache.hadoop.mapreduce.task.reduce.Shuffle$ShuffleError: error in
shuffle in fetcher#9 at
org.apache.hadoop.mapreduce.task.reduce.Shuffle.run(Shuffle.java:134) at
org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:376) at
org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:163) at
java.security.AccessController.doPrivileged(Native Method) at
javax.security.auth.Subject.doAs(Subject.java:415) at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) Caused by:
java.lang.NoClassDefFoundError: Ljava/lang/InternalError at
org.apache.hadoop.io.compress.snappy.SnappyDecompressor.decompressBytesDirect(Native
Method) at
org.apache.hadoop.io.compress.snappy.SnappyDecompressor.decompress(SnappyDecompressor.java:239)
at
org.apache.hadoop.io.compress.BlockDecompressorStream.decompress(BlockDecompressorStream.java:88)
at
org.apache.hadoop.io.compress.DecompressorStream.read(DecompressorStream.java:85)
at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:192) at
org.apache.hadoop.mapreduce.task.reduce.InMemoryMapOutput.shuffle(InMemoryMapOutput.java:97)
at
org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyMapOutput(Fetcher.java:534)
at
org.apache.hadoop.mapreduce.task.reduce.Fetcher.copyFromHost(Fetcher.java:329)
at org.apache.hadoop.mapreduce.task.reduce.Fetcher.run(Fetcher.java:193) Caused
by: java.lang.ClassNotFoundException: Ljava.lang.InternalError at
java.net.URLClassLoader$1.run(URLClassLoader.java:366) at
java.net.URLClassLoader$1.run(URLClassLoader.java:355) at
java.security.AccessController.doPrivileged(Native Method) at
java.net.URLClassLoader.findClass(URLClassLoader.java:354) at
java.lang.ClassLoader.loadClass(ClassLoader.java:425) at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) at
java.lang.ClassLoader.loadClass(ClassLoader.java:358) ... 9 more
{code}
Usually, the reduce task succeeds on retry.
Some of the symptoms are similar to HADOOP-8423, but this fix is already
included (this is on Hadoop 2.6).
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