https://community.cloudera.com/t5/Support-Questions/HDFS-command-hdfs-dfs-ls-throws-fatal-internal-error-java/m-p/60970#M55619 <P>I reproduced the error by intentionally corrupt the _index file.</P><P>&nbsp;</P><P>If you meant "restore" by unarchiving the har file with hdfs dfs -cp command, I find it returns the same AIOOBE, so you won't be able to unarchive it.</P><P>&nbsp;</P><P>Your best bet is to download the _index file, manually repair it, replace the _index file, and see how it goes.</P><P>&nbsp;</P><P>Meanwhile, I filed an Apache jira&nbsp;<A href="https://issues.apache.org/jira/browse/HADOOP-14950" target="_blank" rel="13109657">HADOOP-14950</A>&nbsp;to handle the AIOOBE better, but it wouldn't help fix your corrupt _index file.</P> Mon, 16 Oct 2017 17:18:31 GMT weichiu 2017-10-16T17:18:31Z