Pinpoint: Exception occurred while trying to CRUD userGroup information

[prashantnitt07]

hi ,
we are getting below error , JDBC connection cannt create . please check .

log path name : /app/pinpoint/apache-tomcat/logs
file name :catalina.out

**2017-11-07 18:12:23 INFO Fetch scatterData time : 40ms
2017-11-07 18:12:23 INFO Fetch scatterData time : 13ms
2017-11-07 18:12:29 ERROR can't select user
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:

Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot create PoolableConnectionFactory (Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)

The error may exist in file [/app/pinpoint/apache-tomcat/webapps/ROOT/WEB-INF/classes/mapper/UserMapper.xml]

The error may involve com.navercorp.pinpoint.web.dao.UserDao.selectUserList

The error occurred while executing a query

Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLException: Cannot create PoolableConnectionFactory (Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.)
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:371)
at com.sun.proxy.$Proxy56.selectList(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:191)
at com.navercorp.pinpoint.web.dao.mysql.MysqlUserDao.selectUser(MysqlUserDao.java:58)
at com.navercorp.pinpoint.web.service.UserServiceImpl.selectUser(UserServiceImpl.java:53)
at com.navercorp.pinpoint.web.controller.UserController.getUser(UserController.java:99)**

[minwoo-jung]

please ref https://github.com/naver/pinpoint/blob/master/doc/alarm.md.