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Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Posted by: Somebody .
Date: February 08, 2008 04:35AM

I have exactly the same problem!
My server is running continously on default port, and all queries pass without errors, but once an hour or half i get that exception:

SQLException in method someMethod: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:

** BEGIN NESTED EXCEPTION **

java.io.EOFException
MESSAGE: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

STACKTRACE:

java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:1997)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2411)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2916)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3250)
at com.mysql.jdbc.Connection.execSQL(Connection.java:3179)
at com.mysql.jdbc.Statement.executeQuery(Statement.java:1207)
at database.DatabaseManager.someMethod(SomeClazz.java:457)


** END NESTED EXCEPTION **


Last packet sent to the server was 1 ms ago.
com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2622)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:2916)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1631)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1723)
com.mysql.jdbc.Connection.execSQL(Connection.java:3250)
com.mysql.jdbc.Connection.execSQL(Connection.java:3179)
com.mysql.jdbc.Statement.executeQuery(Statement.java:1207)
at database.DatabaseManager.someMethod(SomeClazz.java:457)

Could you tell me what is going on?

Thank you in advance

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Subject
Written By
Posted
Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Sam Atkinson
October 30, 2007 07:36AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Richard
October 30, 2007 03:43PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
mupparaju srinivas
January 03, 2008 05:38AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
alex teodorescu
January 30, 2009 07:05AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Mark Matthews
October 30, 2007 04:05PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Somebody .
February 08, 2008 04:35AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Andrew Jackson
February 09, 2008 04:26PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Somebody .
February 10, 2008 11:33AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Mark Matthews
February 10, 2008 02:07PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Dmitry Nezhevenko
February 11, 2008 07:33AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Mark Matthews
February 11, 2008 08:22AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Andrew Jackson
February 11, 2008 10:19AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Mark Matthews
February 11, 2008 02:54PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
zattarz za
February 13, 2008 03:47AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Somebody .
February 13, 2008 06:17AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
zattarz za
February 14, 2008 12:37PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
adam birr
December 18, 2008 05:23AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Dmitry Nezhevenko
February 11, 2008 01:45PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Gang Lau
February 11, 2008 11:41PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
JO Ganter
February 19, 2008 10:49AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Mark Matthews
February 19, 2008 10:51AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
JO Ganter
February 19, 2008 11:23AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Mark Matthews
February 19, 2008 11:25AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
JO Ganter
February 19, 2008 12:03PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
david s
February 20, 2008 06:05PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Jean-Nicolas Duval
June 02, 2008 07:29PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
ram babu
September 24, 2008 02:55AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Jonathan Baxter
October 31, 2008 07:56AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Ermicioi Andrei
November 27, 2008 01:56AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Ermicioi Andrei
November 30, 2008 03:15AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Simon Prinzleve
February 03, 2009 03:00PM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Kris Reid
April 08, 2009 12:46AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Josh Jacobs
July 06, 2009 10:45AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Dean Jiang
July 09, 2009 02:59AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Pankaj Tandon
August 24, 2009 10:30AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Kris Reid
August 24, 2009 11:33AM
Re: Connector/J "Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost."
Pankaj Tandon
August 24, 2009 12:43PM


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