Occasional MySQL communication error (not due to timeout):
2012-03-04 09:42:06,220 INFO MIGRATION:160 - Redirecting customer default to url: /ace-custom/groups/default/chat.html?profile=default-visitor, busy: false, locale: en_US
2012-03-04 09:43:32,334 INFO MIGRATION:160 - Redirecting customer default to url: /ace-custom/groups/default/chat.html?profile=default-visitor, busy: false, locale: en_US
2012-03-04 09:44:16,240 INFO ACECOMM:160 - User ace logged in
log4j:ERROR Failed to excute sql
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Last packet sent to the server was 133 ms 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:406)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2985)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2871)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3414)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2536)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1564)
at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1485)
at org.apache.log4j.jdbc.JDBCAppender.execute(JDBCAppender.java:178)
at org.apache.log4j.jdbc.JDBCAppender.flushBuffer(JDBCAppender.java:250)
at org.apache.log4j.jdbc.JDBCAppender.append(JDBCAppender.java:146)
at org.apache.log4j.AppenderSkeleton.doAppend(AppenderSkeleton.java:230)
at org.apache.log4j.helpers.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:65)
at org.apache.log4j.Category.callAppenders(Category.java:203)
at org.apache.log4j.Category.forcedLog(Category.java:388)
at org.apache.log4j.Category.log(Category.java:853)
at org.apache.commons.logging.impl.Log4JLogger.info(Log4JLogger.java:199)
at com.quikj.server.framework.AceLogger.run(AceLogger.java:160)
Caused by: 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:2431)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2882)
... 17 more
