08:41:49.946 [JobExecutor[org.camunda.bpm.engine.spring.components.jobexecutor.SpringJobExecutor]] ERROR c.a.d.util.JdbcUtils - [close,96] - close connection error java.sql.SQLNonTransientConnectionException: Communications link failure during rollback(). Transaction resolution unknown. at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) at com.mysql.cj.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:1835) at com.mysql.cj.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:1693) at com.mysql.cj.jdbc.ConnectionImpl.close(ConnectionImpl.java:713) at com.alibaba.druid.util.JdbcUtils.close(JdbcUtils.java:94) at com.alibaba.druid.pool.DruidDataSource.discardConnection(DruidDataSource.java:1528) at com.alibaba.druid.pool.DruidDataSource.handleFatalError(DruidDataSource.java:1846) at com.alibaba.druid.pool.DruidDataSource.handleConnectionException(DruidDataSource.java:1770) at com.alibaba.druid.pool.DruidPooledConnection.handleException(DruidPooledConnection.java:133) at com.alibaba.druid.pool.DruidPooledConnection.setAutoCommit(DruidPooledConnection.java:717) at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:287) at org.springframework.transaction.support.AbstractPlatformTransactionManager.startTransaction(AbstractPlatformTransactionManager.java:400) at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:137) at org.camunda.bpm.engine.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:71) at org.camunda.bpm.engine.impl.interceptor.ProcessApplicationContextInterceptor.execute(ProcessApplicationContextInterceptor.java:70) at org.camunda.bpm.engine.impl.interceptor.CommandCounterInterceptor.execute(CommandCounterInterceptor.java:35) at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33) at org.camunda.bpm.engine.impl.interceptor.ExceptionCodeInterceptor.execute(ExceptionCodeInterceptor.java:55) at org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.acquireJobs(SequentialJobAcquisitionRunnable.java:164) at org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.run(SequentialJobAcquisitionRunnable.java:80) at java.base/java.lang.Thread.run(Thread.java:834) 08:41:49.949 [JobExecutor[org.camunda.bpm.engine.spring.components.jobexecutor.SpringJobExecutor]] ERROR c.a.d.p.DruidDataSource - [handleFatalError,1849] - discard connection com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 79,169 milliseconds ago. The last packet sent successfully to the server was 79,172 milliseconds ago. at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) at com.mysql.cj.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:2050) at com.alibaba.druid.pool.DruidPooledConnection.setAutoCommit(DruidPooledConnection.java:713) at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:287) at org.springframework.transaction.support.AbstractPlatformTransactionManager.startTransaction(AbstractPlatformTransactionManager.java:400) at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:137) at org.camunda.bpm.engine.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:71) at org.camunda.bpm.engine.impl.interceptor.ProcessApplicationContextInterceptor.execute(ProcessApplicationContextInterceptor.java:70) at org.camunda.bpm.engine.impl.interceptor.CommandCounterInterceptor.execute(CommandCounterInterceptor.java:35) at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33) at org.camunda.bpm.engine.impl.interceptor.ExceptionCodeInterceptor.execute(ExceptionCodeInterceptor.java:55) at org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.acquireJobs(SequentialJobAcquisitionRunnable.java:164) at org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.run(SequentialJobAcquisitionRunnable.java:80) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure The last packet successfully received from the server was 79,169 milliseconds ago. The last packet sent successfully to the server was 79,172 milliseconds ago. at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:581) at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:761) at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:700) at com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:1051) at com.mysql.cj.protocol.a.NativeProtocol.sendQueryString(NativeProtocol.java:997) at com.mysql.cj.NativeSession.execSQL(NativeSession.java:663) at com.mysql.cj.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:2033) ... 13 common frames omitted Caused by: java.net.SocketTimeoutException: Read timed out at java.base/java.net.SocketInputStream.socketRead0(Native Method) at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:115) at java.base/java.net.SocketInputStream.read(SocketInputStream.java:168) at java.base/java.net.SocketInputStream.read(SocketInputStream.java:140) at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:484) at java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:478) at java.base/sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:70) at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1334) at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:977) at java.base/java.io.FilterInputStream.read(FilterInputStream.java:133) at com.mysql.cj.protocol.FullReadInputStream.readFully(FullReadInputStream.java:64) at com.mysql.cj.protocol.a.SimplePacketReader.readHeaderLocal(SimplePacketReader.java:81) at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:63) at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:45) at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:52) at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:41) at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:54) at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:44) at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:575) ... 19 common frames omitted 08:41:49.952 [JobExecutor[org.camunda.bpm.engine.spring.components.jobexecutor.SpringJobExecutor]] ERROR o.c.b.e.jobexecutor - [logError,215] - ENGINE-14019 Exception during job acquisition Could not open JDBC Connection for transaction; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 79,169 milliseconds ago. The last packet sent successfully to the server was 79,172 milliseconds ago. org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 79,169 milliseconds ago. The last packet sent successfully to the server was 79,172 milliseconds ago. at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:309) at org.springframework.transaction.support.AbstractPlatformTransactionManager.startTransaction(AbstractPlatformTransactionManager.java:400) at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:137) at org.camunda.bpm.engine.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:71) at org.camunda.bpm.engine.impl.interceptor.ProcessApplicationContextInterceptor.execute(ProcessApplicationContextInterceptor.java:70) at org.camunda.bpm.engine.impl.interceptor.CommandCounterInterceptor.execute(CommandCounterInterceptor.java:35) at org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:33) at org.camunda.bpm.engine.impl.interceptor.ExceptionCodeInterceptor.execute(ExceptionCodeInterceptor.java:55) at org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.acquireJobs(SequentialJobAcquisitionRunnable.java:164) at org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.run(SequentialJobAcquisitionRunnable.java:80) at java.base/java.lang.Thread.run(Thread.java:834) Caused by: com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet successfully received from the server was 79,169 milliseconds ago. The last packet sent successfully to the server was 79,172 milliseconds ago. at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) at com.mysql.cj.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:2050) at com.alibaba.druid.pool.DruidPooledConnection.setAutoCommit(DruidPooledConnection.java:713) at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:287) ... 11 common frames omitted Caused by: com.mysql.cj.exceptions.CJCommunicationsException: Communications link failure The last packet successfully received from the server was 79,169 milliseconds ago. The last packet sent successfully to the server was 79,172 milliseconds ago. at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:581) at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:761) at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:700) at com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:1051) at com.mysql.cj.protocol.a.NativeProtocol.sendQueryString(NativeProtocol.java:997) at com.mysql.cj.NativeSession.execSQL(NativeSession.java:663) at com.mysql.cj.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:2033) ... 13 common frames omitted Caused by: java.net.SocketTimeoutException: Read timed out at java.base/java.net.SocketInputStream.socketRead0(Native Method) at java.base/java.net.SocketInputStream.socketRead(SocketInputStream.java:115) at java.base/java.net.SocketInputStream.read(SocketInputStream.java:168) at java.base/java.net.SocketInputStream.read(SocketInputStream.java:140) at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:484) at java.base/sun.security.ssl.SSLSocketInputRecord.readHeader(SSLSocketInputRecord.java:478) at java.base/sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:70) at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1334) at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:977) at java.base/java.io.FilterInputStream.read(FilterInputStream.java:133) at com.mysql.cj.protocol.FullReadInputStream.readFully(FullReadInputStream.java:64) at com.mysql.cj.protocol.a.SimplePacketReader.readHeaderLocal(SimplePacketReader.java:81) at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:63) at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:45) at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:52) at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:41) at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:54) at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:44) at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:575) ... 19 common frames omitted 10:27:21.389 [main] ERROR o.s.b.d.LoggingFailureAnalysisReporter - [report,40] - *************************** APPLICATION FAILED TO START *************************** Description: Web server failed to start. Port 8080 was already in use. Action: Identify and stop the process that's listening on port 8080 or configure this application to listen on another port.