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From Chinna <chinna...@huawei.com>
Subject Hive Client is indefenitely waiting for reading from Socket
Date Tue, 12 Apr 2011 16:39:51 GMT
Hi All,

Hive Client is indefinitely waiting for reading from Socket. Thread dump is
added below.
	
Cause is:
 
	In the HiveClient, when client socket is created, the read timeout
is mentioned is 0. So the socket will indefinitely wait when the machine
where Hive Server is running is "shutdown" or "network is unplugged". The
same may not happen if the HiveServer alone is killed or gracefully
shutdown. At this time, client will get "connection reset exception". 

Code in HiveConnection
-----------------------------------
transport = new TSocket(host, port);
TProtocol protocol = new TBinaryProtocol(transport); client = new
HiveClient(protocol);

In the Client side, they send the query and wait for the response
send_execute(query, id); recv_execute(); // place where client waiting is
initiated

Here we cannot give a time out for socket also, because Query may execute
for long time. The query execution time cannot be predetermined. 

Any suggestions for fixing this issue.

For this I have raised an issue HIVE-2110.

Thread dump:

"main" prio=10 tid=0x0000000040111000 nid=0x3641 runnable
[0x00007f0d73f29000]
	java.lang.Thread.State: RUNNABLE
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.read(SocketInputStream.java:129)
	at java.io.BufferedInputStream.fill(BufferedInputStream.java:218)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:258)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:317) 

	locked <0x00007f0d5d3f0828> (a java.io.BufferedInputStream)
	at
org.apache.thrift.transport.TIOStreamTransport.read(TIOStreamTransport.java:
125)
	at
org.apache.thrift.transport.TTransport.readAll(TTransport.java:84)
	at
org.apache.thrift.protocol.TBinaryProtocol.readAll(TBinaryProtocol.java:314)
	at
org.apache.thrift.protocol.TBinaryProtocol.readI32(TBinaryProtocol.java:262)
	at
org.apache.thrift.protocol.TBinaryProtocol.readMessageBegin(TBinaryProtocol.
java:192)
	at
org.apache.hadoop.hive.service.ThriftHive$Client.recv_execute(ThriftHive.jav
a:130)
	at
org.apache.hadoop.hive.service.ThriftHive$Client.execute(ThriftHive.java:109
) 
	locked <0x00007f0d5d3f0878> (a org.apache.thrift.transport.TSocket)
	at
org.apache.hadoop.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:21
8)
	at
org.apache.hadoop.hive.jdbc.HiveStatement.execute(HiveStatement.java:154)
	at com.huawei.isap.i3.HiveJdbcClient.main(HiveJdbcClient.java:114)


Thanks & Regards,
Chinna Rao Lalam



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