Hooman Peiro Sajjad created HDFS-3848:
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Summary: A Bug in recoverLeaseInternal method of FSNameSystem class
Key: HDFS-3848
URL: https://issues.apache.org/jira/browse/HDFS-3848
Project: Hadoop HDFS
Issue Type: Bug
Components: name-node
Affects Versions: 0.23.1
Reporter: Hooman Peiro Sajjad
This is a bug in logic of the method recoverLeaseInternal. In line 1322 it
checks if the owner of the file is trying to recreate the file. The condition
of the if statement is
(leaseFile != null && leaseFile.equals(lease)) ||
lease.getHolder().equals(holder)
As it can be seen, there are two operands (conditions) connected with an "or"
operator. The first operand is straight and will be true only if the holder of
the file is the new holder. But the problem is the second operand which will be
always true since the "lease" object is the one found by the "holder" by
calling "Lease lease = leaseManager.getLease(holder);" in line 1315.
To fix this I think the if statement only should contain the following the
condition:
(leaseFile != null && leaseFile.getHolder().equals(holder))
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