使用mybatis-spring从java到mysql服务器的调用被无限期地卡住。我们已检查没有长时间运行的查询。已为查询配置defaultquerytimeout值，但它不会中断进程挂起。最初一段时间（1-2天）查询工作正常，然后突然出现挂起问题。我找不到任何复制路径，但问题很少发生（进程重新启动后1或2天）。
我们怎样才能避免这个悬而未决的问题？请提出一个打破僵局的方法。
附在螺纹钉下面。

"mf.gm" #97 daemon prio=5 os_prio=0 tid=0x00007f9d18008000 nid=0x1dd0 runnable [0x00007f9ce1991000]
   java.lang.Thread.State: RUNNABLE
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
        at java.net.SocketInputStream.read(SocketInputStream.java:171)
        at java.net.SocketInputStream.read(SocketInputStream.java:141)
        at com.mysql.jdbc.util.ReadAheadInputStream.fill(ReadAheadInputStream.java:100)
        at com.mysql.jdbc.util.ReadAheadInputStream.readFromUnderlyingStreamIfNecessary(ReadAheadInputStream.java:143)
        at com.mysql.jdbc.util.ReadAheadInputStream.read(ReadAheadInputStream.java:173)
        - locked <0x000000008119e1d0> (a com.mysql.jdbc.util.ReadAheadInputStream)
        at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2911)
        at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3337)
        at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3327)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2530)
        - locked <0x000000008119e220> (a com.mysql.jdbc.JDBC4Connection)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1907)
        - locked <0x000000008119e220> (a com.mysql.jdbc.JDBC4Connection)
        at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1199)
        - locked <0x000000008119e220> (a com.mysql.jdbc.JDBC4Connection)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
        at org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
        at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:59)
        at com.sun.proxy.$Proxy29.execute(Unknown Source)
        at org.apache.ibatis.executor.statement.PreparedStatementHandler.query(PreparedStatementHandler.java:63)
        at org.apache.ibatis.executor.statement.RoutingStatementHandler.query(RoutingStatementHandler.java:79)
        at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49)

块引用