socket close timeout

Hello :)


I am using "mysql-connector-java-5.1.13-bin.jar" in my java projet. The
MySQL database and the java application aro en the name server, I use
localhost to access to the database.

My database is use a lot and sometimes a query of java application can be
locked because an other query is running. And sometimes I have this
exception :


*The last packet successfully received from the server was 315,737
milliseconds ago.  The last packet sent successfully to the server was 76
milliseconds ago.
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:409)
    at
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1118)
    at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3055)
    at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2941)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3489)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2113)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2562)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2512)
    at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1476)
    at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
    at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at
org.logicalcobwebs.proxool.ProxyStatement.invoke(ProxyStatement.java:100)
    at
org.logicalcobwebs.proxool.ProxyStatement.intercept(ProxyStatement.java:57)
    at
$java.sql.Statement$$EnhancerByProxool$$331981a9.executeQuery(<generated>)
    at *****.getNbOcc(Utils.java:72)
    at ****(Report.java:453)
    at ***
Caused by: java.net.SocketException: Socket closed
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:129)
    at
com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:114)
    at
com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:161)
    at
com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:189)
    at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2499)
    at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2952)
    ... 19 more*



It seems to be a socket timeout. The query is still alive in Mysql and will
be execute. I have a python application which can wait a long time (1h ...)
and still working, consequently the problem seems to com frome Java or the
mysql connector.

I think that the socket is not used while the query is locked and maybe java
has a timeout on it and close it.

Have you some ideas to fix this ?


-- 
Regards.