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  1. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
  2.  
  3. The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
  4. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_101]
  5. at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_101]
  6. at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_101]
  7. at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_101]
  8. at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  9. at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:990) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  10. at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:342) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  11. at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2188) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  12. at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2221) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  13. at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2016) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  14. at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:776) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  15. at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  16. at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_101]
  17. at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_101]
  18. at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_101]
  19. at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_101]
  20. at com.mysql.jdbc.Util.handleNewInstance(Util.java:425) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  21. at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  22. at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  23. at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:117) ~[HikariCP-2.7.9.jar:na]
  24. at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:123) ~[HikariCP-2.7.9.jar:na]
  25. at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:365) ~[HikariCP-2.7.9.jar:na]
  26. at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:194) ~[HikariCP-2.7.9.jar:na]
  27. at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:460) [HikariCP-2.7.9.jar:na]
  28. at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:534) [HikariCP-2.7.9.jar:na]
  29. at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) [HikariCP-2.7.9.jar:na]
  30. at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) [HikariCP-2.7.9.jar:na]
  31. at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:151) [spring-jdbc-5.0.6.RELEASE.jar:5.0.6.RELEASE]
  32. at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:115) [spring-jdbc-5.0.6.RELEASE.jar:5.0.6.RELEASE]
  33. at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:78) [spring-jdbc-5.0.6.RELEASE.jar:5.0.6.RELEASE]
  34. at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:82) [mybatis-spring-1.3.2.jar:1.3.2]
  35. at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:68) [mybatis-spring-1.3.2.jar:1.3.2]
  36. at org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:338) [mybatis-3.4.6.jar:3.4.6]
  37. at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84) [mybatis-3.4.6.jar:3.4.6]
  38. at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:49) [mybatis-3.4.6.jar:3.4.6]
  39. at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117) [mybatis-3.4.6.jar:3.4.6]
  40. at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76) [mybatis-3.4.6.jar:3.4.6]
  41. at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198) [mybatis-3.4.6.jar:3.4.6]
  42. at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185) [mybatis-3.4.6.jar:3.4.6]
  43. at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
  44. at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
  45. at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
  46. at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
  47. at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433) [mybatis-spring-1.3.2.jar:1.3.2]
  48. at com.sun.proxy.$Proxy49.insert(Unknown Source) [na:na]
  49. at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:278) [mybatis-spring-1.3.2.jar:1.3.2]
  50. at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:58) [mybatis-3.4.6.jar:3.4.6]
  51. at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:59) [mybatis-3.4.6.jar:3.4.6]
  52. at com.sun.proxy.$Proxy53.insertTime(Unknown Source) [na:na]
  53. at com.services.TaskService.saveCurrentTime(TaskService.java:61) [classes/:na]
  54. at com.services.TaskService.doTask(TaskService.java:47) [classes/:na]
  55. at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_101]
  56. at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_101]
  57. at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_101]
  58. at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_101]
  59. at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
  60. at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) [spring-context-5.0.6.RELEASE.jar:5.0.6.RELEASE]
  61. at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_101]
  62. at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [na:1.8.0_101]
  63. at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_101]
  64. at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_101]
  65. at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_101]
  66. at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101]
  67. at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
  68. Caused by: java.net.ConnectException: Connection refused: connect
  69. at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_101]
  70. at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85) ~[na:1.8.0_101]
  71. at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_101]
  72. at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_101]
  73. at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_101]
  74. at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.8.0_101]
  75. at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_101]
  76. at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_101]
  77. at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:211) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  78. at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:301) ~[mysql-connector-java-5.1.46.jar:5.1.46]
  79. ... 57 common frames omitted
  80.  
  81. 2018-05-25 21:12:46.941 ERROR 6560 --- [pool-1-thread-1] com.services.TaskService : CAN NOT CONNET TO DATABASE, RECONNECTING....
  82. 2018-05-25 21:12:48.923 INFO 6560 --- [pool-1-thread-1] com.services.TaskService : Trying to save time
  83. 2018-05-25 21:12:48.923 INFO 6560 --- [pool-1-thread-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
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