项目切换为K8S后，数据库连接出现异常怎么解决

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项目切换为K8S的时候访问出现异常，路过的伙伴可以帮忙分析一下哈：

Caused by: org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
### The error may exist in class path resource [firsthand-core-sqlmap/cdm/YlQuarzRegisterPHKXMapper.xml]
### The error may involve com.yooli.cdm.dao.YlQuarzRegisterPHKXMapper.selectIsSuccess
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
   at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:26)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:111)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:66)
   at sun.reflect.GeneratedMethodAccessor325.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:354)
   ... 6 common frames omitted
Caused by: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Connections could not be acquired from the underlying database!
   at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
   at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:80)
   at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:66)
   at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:279)
   at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:72)
   at org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:59)
   at org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:267)
   at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:137)
   at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:120)
   at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)
   ... 12 common frames omitted
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
   at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:689)
   at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
   at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
   at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
   ... 21 common frames omitted
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
   at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1418)
   at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
   at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755)
   at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682)
   ... 24 common frames omitted

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项目切换为K8S后，数据库连接出现异常怎么解决

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