He Xiaoqiao created HDFS-9334:
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Summary: NameNode crash caused by ArrayIndexOutOfBoundsException
Key: HDFS-9334
URL: https://issues.apache.org/jira/browse/HDFS-9334
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Affects Versions: 2.4.1
Reporter: He Xiaoqiao
Assignee: He Xiaoqiao
when remove block from list of blocks by method {{listRemove}} in
{{BlockInfo.java}}, and {{findStorageInfo(storage)}} return -1 means not found,
{{prev.setNext(prev.findStorageInfo(storage), next)}} or
{{next.setPrevious(next.findStorageInfo(storage), prev)}} could throw
ArrayIndexOutOfBoundsException cause NameNode Process exit.
{code:title=BlockInfo.java}
BlockInfo listRemove(BlockInfo head, DatanodeStorageInfo storage) {
if(head == null)
return null;
int dnIndex = this.findStorageInfo(storage);
if(dnIndex < 0) // this block is not on the data-node list
return head;
BlockInfo next = this.getNext(dnIndex);
BlockInfo prev = this.getPrevious(dnIndex);
this.setNext(dnIndex, null);
this.setPrevious(dnIndex, null);
if(prev != null)
prev.setNext(prev.findStorageInfo(storage), next);
if(next != null)
next.setPrevious(next.findStorageInfo(storage), prev);
if(this == head) // removing the head
head = next;
return head;
}
{code}
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