Periodical warning "Destroying connection that is not valid"

Hello!
I work with camunda app by EJB remote. All work correctly.
But I have a periodical warning and a stack trace. I don’t see in the stack trace my app’s package.
I am not understanding how investigate this problem. Please help to find a solution the problem.

2020-03-25 16:02:38,656 WARN  [org.jboss.jca.adapters.jdbc.xa.XAManagedConnectionFactory] (pool-10-thread-1) IJ030027: Destroying connection that is not valid, due to the following exception: org.mariadb.jdbc.MariaDbConnection@55acd64f: java.sql.SQLNonTransientConnectionException: (conn=10880) Could not send query: Connection reset by peer (Write failed)
	at org.mariadb//org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.get(ExceptionMapper.java:161)
	at org.mariadb//org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.getException(ExceptionMapper.java:106)
	at org.mariadb//org.mariadb.jdbc.MariaDbStatement.executeExceptionEpilogue(MariaDbStatement.java:235)
	at org.mariadb//org.mariadb.jdbc.MariaDbStatement.executeInternal(MariaDbStatement.java:332)
	at org.mariadb//org.mariadb.jdbc.MariaDbStatement.executeQuery(MariaDbStatement.java:502)
	at org.jboss.ironjacamar.jdbcadapters@1.4.11.Final//org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConnectionChecker.isValidConnection(MySQLValidConnectionChecker.java:104)
	at org.jboss.ironjacamar.jdbcadapters@1.4.11.Final//org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.isValidConnection(BaseWrapperManagedConnectionFactory.java:1273)
	at org.jboss.ironjacamar.jdbcadapters@1.4.11.Final//org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnectionFactory.getInvalidConnections(BaseWrapperManagedConnectionFactory.java:1086)
	at org.jboss.ironjacamar.impl@1.4.11.Final//org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedDequeManagedConnectionPool.getConnection(SemaphoreConcurrentLinkedDequeManagedConnectionPool.java:379)
	at org.jboss.ironjacamar.impl@1.4.11.Final//org.jboss.jca.core.connectionmanager.pool.AbstractPool.getTransactionNewConnection(AbstractPool.java:714)
	at org.jboss.ironjacamar.impl@1.4.11.Final//org.jboss.jca.core.connectionmanager.pool.AbstractPool.getConnection(AbstractPool.java:613)
	at org.jboss.ironjacamar.impl@1.4.11.Final//org.jboss.jca.core.connectionmanager.AbstractConnectionManager.getManagedConnection(AbstractConnectionManager.java:624)
	at org.jboss.ironjacamar.impl@1.4.11.Final//org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.getManagedConnection(TxConnectionManagerImpl.java:440)
	at org.jboss.ironjacamar.impl@1.4.11.Final//org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:789)
	at org.jboss.ironjacamar.jdbcadapters@1.4.11.Final//org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:138)
	at org.jboss.as.connector@14.0.1.Final//org.jboss.as.connector.subsystems.datasources.WildFlyDataSource.getConnection(WildFlyDataSource.java:64)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.transaction.managed.ManagedTransaction.openConnection(ManagedTransaction.java:89)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.transaction.managed.ManagedTransaction.getConnection(ManagedTransaction.java:60)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.executor.BaseExecutor.getConnection(BaseExecutor.java:336)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:84)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:148)
	at org.mybatis.mybatis@3.4.4//org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:141)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.db.sql.DbSqlSession.selectList(DbSqlSession.java:97)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.selectListWithRawParameter(DbEntityManager.java:183)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.selectList(DbEntityManager.java:175)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.selectList(DbEntityManager.java:171)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.db.entitymanager.DbEntityManager.selectList(DbEntityManager.java:160)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.persistence.entity.JobManager.findNextJobsToExecute(JobManager.java:195)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.cmd.AcquireJobsCmd.execute(AcquireJobsCmd.java:59)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.cmd.AcquireJobsCmd.execute(AcquireJobsCmd.java:37)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.interceptor.CommandExecutorImpl.execute(CommandExecutorImpl.java:27)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:106)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.interceptor.JtaTransactionInterceptor.execute(JtaTransactionInterceptor.java:60)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.interceptor.ProcessApplicationContextInterceptor.execute(ProcessApplicationContextInterceptor.java:69)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:32)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.acquireJobs(SequentialJobAcquisitionRunnable.java:157)
	at org.camunda.bpm.camunda-engine@7.10.0//org.camunda.bpm.engine.impl.jobexecutor.SequentialJobAcquisitionRunnable.run(SequentialJobAcquisitionRunnable.java:75)
	at org.jboss.threads@2.3.2.Final//org.jboss.threads.SimpleDirectExecutor.execute(SimpleDirectExecutor.java:29)
	at org.jboss.threads@2.3.2.Final//org.jboss.threads.QueueExecutor.runTask(QueueExecutor.java:789)
	at org.jboss.threads@2.3.2.Final//org.jboss.threads.QueueExecutor.access$100(QueueExecutor.java:44)
	at org.jboss.threads@2.3.2.Final//org.jboss.threads.QueueExecutor$Worker.run(QueueExecutor.java:809)
	at java.base/java.lang.Thread.run(Thread.java:834)
	at org.jboss.threads@2.3.2.Final//org.jboss.threads.JBossThread.run(JBossThread.java:485)
Caused by: java.sql.SQLException: Could not send query: Connection reset by peer (Write failed)
	at org.mariadb//org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.handleIoException(AbstractQueryProtocol.java:1738)
	at org.mariadb//org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executeQuery(AbstractQueryProtocol.java:164)
	at org.mariadb//org.mariadb.jdbc.MariaDbStatement.executeInternal(MariaDbStatement.java:326)
	... 44 more
Caused by: java.net.SocketException: Connection reset by peer (Write failed)
	at java.base/java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.base/java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:110)
	at java.base/java.net.SocketOutputStream.write(SocketOutputStream.java:150)
	at org.mariadb//org.mariadb.jdbc.internal.io.output.StandardPacketOutputStream.flushBuffer(StandardPacketOutputStream.java:111)
	at org.mariadb//org.mariadb.jdbc.internal.io.output.AbstractPacketOutputStream.flush(AbstractPacketOutputStream.java:172)
	at org.mariadb//org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executeQuery(AbstractQueryProtocol.java:158)
	... 45 more