com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 931,092 milliseconds ago. The last packet sent successfully to the server was 931,092 milliseconds ago.

Google Groups | Nadav Samet | 1 year ago
  1. 0

    Debugging "Communications link failure"

    Google Groups | 1 year ago | Nadav Samet
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 931,092 milliseconds ago. The last packet sent successfully to the server was 931,092 milliseconds ago.
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    Java - ssh-tunneling to mysqldatabase with JSch

    Stack Overflow | 2 years ago | Tracker
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 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.
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    Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException

    Stack Overflow | 1 year ago | emoleumassi
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 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.
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    Bug in production - connection to db

    GitHub | 11 months ago | acrepet
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 38 065 062 milliseconds ago. The last packet sent successfully to the server was 38 065 062 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
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    linux tomcat MySql connection failure

    Stack Overflow | 9 months ago | FDavidov
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 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.

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Root Cause Analysis

  1. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException

    Communications link failure The last packet successfully received from the server was 931,092 milliseconds ago. The last packet sent successfully to the server was 931,092 milliseconds ago.

    at sun.reflect.NativeConstructorAccessorImpl.newInstance0()
  2. Java RT
    Constructor.newInstance
    1. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    2. sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    3. sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    4. java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    4 frames
  3. MySQL jdbc
    ResultSetImpl.next
    1. com.mysql.jdbc.Util.handleNewInstance(Util.java:389)
    2. com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1038)
    3. com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3422)
    4. com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3322)
    5. com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3762)
    6. com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:870)
    7. com.mysql.jdbc.MysqlIO.nextRow(MysqlIO.java:1928)
    8. com.mysql.jdbc.MysqlIO.fetchRowsViaCursor(MysqlIO.java:4790)
    9. com.mysql.jdbc.RowDataCursor.fetchMoreRows(RowDataCursor.java:394)
    10. com.mysql.jdbc.RowDataCursor.hasNext(RowDataCursor.java:313)
    11. com.mysql.jdbc.RowDataCursor.next(RowDataCursor.java:343)
    12. com.mysql.jdbc.ResultSetImpl.next(ResultSetImpl.java:6338)
    12 frames
  4. HikariCP-java6
    ResultSetJavassistProxy.next
    1. com.zaxxer.hikari.proxy.ResultSetJavassistProxy.next(ResultSetJavassistProxy.java)
    1 frame
  5. slick.jdbc
    PositionedResultIterator.fetchNext
    1. slick.jdbc.PositionedResult.nextRow(PositionedResult.scala:26)
    2. slick.jdbc.PositionedResultIterator.fetchNext(PositionedResult.scala:175)
    2 frames
  6. slick.util
    ReadAheadIterator$class.hasNext
    1. slick.util.ReadAheadIterator$class.slick$util$ReadAheadIterator$$update(ReadAheadIterator.scala:34)
    2. slick.util.ReadAheadIterator$class.hasNext(ReadAheadIterator.scala:40)
    2 frames
  7. slick.jdbc
    PositionedResultIterator.hasNext
    1. slick.jdbc.PositionedResultIterator.hasNext(PositionedResult.scala:167)
    1 frame
  8. Scala
    Iterator$class.foreach
    1. scala.collection.Iterator$class.foreach(Iterator.scala:750)
    1 frame
  9. slick.jdbc
    StreamingInvokerAction$class.run
    1. slick.jdbc.PositionedResultIterator.foreach(PositionedResult.scala:167)
    2. slick.jdbc.Invoker$class.foreach(Invoker.scala:70)
    3. slick.jdbc.StatementInvoker.foreach(StatementInvoker.scala:16)
    4. slick.jdbc.StreamingInvokerAction$class.run(StreamingInvokerAction.scala:22)
    4 frames