大佬们，有兴趣的帮忙看看呗。
最近生产上总是报数据库断连的问题，用的Atomikos做了事务，然后查看日志，除了之前有几个查询错误的日志。其他的都是正常打印，然后就打印到这个日志。之后程序就挂掉了需要重启。报的错都是查询因为参数不对，然后出错了，那些都可以解决。然后就是本地还有部署测试机没有出现过断连，但是服务器一周就出现了2-3次。错误如下
### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.atomikos.jdbc.AtomikosSQLException: Connection pool exhaus
ted - try increasing 'maxPoolSize' and/or 'borrowConnectionTimeout' on the DataSourceBean.
### The error may exist in mapper/custom/ContractMapper.xml
### The error may involve contractMapper.queryContracts_COUNT
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.atomikos.jdbc.AtomikosSQLException: Connection pool exhausted - try increasing 'maxP
oolSize' and/or 'borrowConnectionTimeout' on the DataSourceBean.
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:122)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:113)
at sun.reflect.GeneratedMethodAccessor100.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
... 57 more
Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.atomikos.jdbc.AtomikosSQLException: Connection pool exhausted - try increasing 'maxP
oolSize' and/or 'borrowConnectionTimeout' on the DataSourceBean.
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82)
at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68)
at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:315)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:75)
at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:61)
at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:303)
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:154)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:102)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:82)
at sun.reflect.GeneratedMethodAccessor83.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49)
at com.github.pagehelper.SqlUtil.doProcessPage(SqlUtil.java:478)
at com.github.pagehelper.SqlUtil._processPage(SqlUtil.java:407)
at com.github.pagehelper.SqlUtil.processPage(SqlUtil.java:374)
at com.github.pagehelper.PageHelper.intercept(PageHelper.java:255)
at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:61)
at com.sun.proxy.$Proxy35.query(Unknown Source)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:120)
... 62 more
Caused by: com.atomikos.jdbc.AtomikosSQLException: Connection pool exhausted - try increasing 'maxPoolSize' and/or 'borrowConnectionTimeout' on the DataSourceBean.
at com.atomikos.jdbc.AtomikosSQLException.throwAtomikosSQLException(AtomikosSQLException.java:46)
at com.atomikos.jdbc.AbstractDataSourceBean.throwAtomikosSQLException(AbstractDataSourceBean.java:90)
at com.atomikos.jdbc.AbstractDataSourceBean.throwAtomikosSQLException(AbstractDataSourceBean.java:85)
at com.atomikos.jdbc.AbstractDataSourceBean.getConnection(AbstractDataSourceBean.java:347)
at com.atomikos.jdbc.AbstractDataSourceBean.getConnection(AbstractDataSourceBean.java:394)
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
... 82 more
我的最大连接配置的是120 ，borrowConnectionTimeout 配置的是60，Atomikos 我没有写配置文件，使用的默认的配置。
目前我分析的是会不会是mybatiss没有释放链接，然后因为之前的一些查询失败的连接没释放，导致我后面没有连接，从而使程序断连。
有没有大佬帮忙分析一下到底是哪里的问题？还有mybatis比如查询失败后会不会正常释放链接？我的120链接按道理不少了，可是还会占满。