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https://issues.apache.org/jira/browse/HDFS-8972?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15548840#comment-15548840
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Jagadesh Kiran N commented on HDFS-8972:
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Not able to reproduce the same , please suggest how to reproduce
> EINVAL Invalid argument when RAM_DISK usage 90%+
> ------------------------------------------------
>
> Key: HDFS-8972
> URL: https://issues.apache.org/jira/browse/HDFS-8972
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Xu Chen
> Assignee: Jagadesh Kiran N
> Priority: Critical
>
> the directory which uses LAZY_PERSIST policy , so use "df" command look up
> tmpfs is usage >=90% , run spark,hive or mapreduce application , Datanode
> come out following exception
> {code}
> 2015-08-26 17:37:34,123 WARN org.apache.hadoop.io.ReadaheadPool: Failed
> readahead on null
> EINVAL: Invalid argument
> at org.apache.hadoop.io.nativeio.NativeIO$POSIX.posix_fadvise(Native
> Method)
> at
> org.apache.hadoop.io.nativeio.NativeIO$POSIX.posixFadviseIfPossible(NativeIO.java:267)
> at
> org.apache.hadoop.io.nativeio.NativeIO$POSIX$CacheManipulator.posixFadviseIfPossible(NativeIO.java:146)
> at
> org.apache.hadoop.io.ReadaheadPool$ReadaheadRequestImpl.run(ReadaheadPool.java:206)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> And the application is slowly than without exception 25%
> Regards
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