Brandon Li created HDFS-7925:
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Summary: truncate RPC should not be considered idempotent
Key: HDFS-7925
URL: https://issues.apache.org/jira/browse/HDFS-7925
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Affects Versions: 2.7.0
Reporter: Brandon Li
Currently truncate is considered as an idempotent call in ClientProtocol.
However, the retried RPC request could get a lease error like following:
2015-03-12 11:45:47,320 INFO ipc.Server (Server.java:run(2053)) - IPC Server
handler 6 on 8020, call org.apache.hadoop.hdfs.protocol.ClientProtocol.truncate
from 192.168.76.4:49763 Call#1 Retry#1:
org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException: Failed to
TRUNCATE_FILE /user/hrt_qa/testFileTr for DFSClient_NONMAPREDUCE_171671673_1 on
192.168.76.4 because DFSClient_NONMAPREDUCE_171671673_1 is already the current
lease holder.
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