我们在日志中看到大量此类错误（每秒 1k）
错误 [org.hibernate.engine.jdbc.spi.SqlExceptionHelper] (EE-ManagedScheduledExecutorService-default-Thread-1) javax.resource.ResourceException: IJ000457: unchecked throwable in managedConnectionReconnected() cl=org.jboss.jca.core.connectionmanager .listener.TxConnectionListener@7cf06c5e[state=NORMAL 托管连接=org.jboss.jca.adapters.jdbc.local.LocalManagedConnection@6cecd5f4 连接句柄=0 lastReturned=1589648691492 lastValidated=1589648383871 lastCheckedOut=1589648390322 trackByTx=false pool=org.jboss。 jca.core.connectionmanager.pool.strategy.OnePool@5755db92 mcp=SemaphoreConcurrentLinkedQueueManagedConnectionPool@7c0f33f2[pool=OAPIDS] xaResource=LocalXAResourceImpl@458307ec[connectionListener=7cf06c5e connectionManager=180e08c1 warn=false currentXid=null productName=PostgreSQL productVersion=9.5.14 jndiName=java:/OAPIDS] txSync=null]
是否表明数据源处于大负载或应用服务器错误，已在更高版本中修复？
我们的应用服务器是 Wildfly 12
DB 是 Postgres
并且某些数据库查询不能同时工作，出现“无法获取连接”错误
Caused by: org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:87)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:109)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:47)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:146)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172)
at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:148)
at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1934)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1903)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1881)
at org.hibernate.loader.Loader.doQuery(Loader.java:925)
at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:342)
at org.hibernate.loader.Loader.doList(Loader.java:2622)
at org.hibernate.loader.Loader.doList(Loader.java:2605)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2434)
at org.hibernate.loader.Loader.list(Loader.java:2429)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:336)
at org.hibernate.internal.SessionImpl.listCustomQuery(SessionImpl.java:1980)
at org.hibernate.internal.AbstractSessionImpl.list(AbstractSessionImpl.java:322)
at org.hibernate.internal.SQLQueryImpl.list(SQLQueryImpl.java:125)
at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:606)
at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:483)
... 81 more
Caused by: java.sql.SQLException: javax.resource.ResourceException: IJ000457: Unchecked throwable in managedConnectionReconnected() cl=org.jboss.jca.core.connectionmanager.listener.TxConnectionListener@43697861[state=NORMAL managed connection=org.jboss.jca.adapters.jdbc.local.LocalManagedConnection@58a27593 connection handles=0 lastReturned=1589649243598 lastValidated=1589648924489 lastCheckedOut=1589649243527 trackByTx=false pool=org.jboss.jca.core.connectionmanager.pool.strategy.OnePool@5755db92 mcp=SemaphoreConcurrentLinkedQueueManagedConnectionPool@7c0f33f2[pool=OAPIDS] xaResource=LocalXAResourceImpl@2e150b3f[connectionListener=43697861 connectionManager=180e08c1 warned=false currentXid=null productName=PostgreSQL productVersion=9.5.14 jndiName=java:/OAPIDS] txSync=null]
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:146)
at org.jboss.as.connector.subsystems.datasources.WildFlyDataSource.getConnection(WildFlyDataSource.java:64)
at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)
at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:386)
at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:84)
... 101 more
Caused by: javax.resource.ResourceException: IJ000457: Unchecked throwable in managedConnectionReconnected() cl=org.jboss.jca.core.connectionmanager.listener.TxConnectionListener@43697861[state=NORMAL managed connection=org.jboss.jca.adapters.jdbc.local.LocalManagedConnection@58a27593 connection handles=0 lastReturned=1589649243598 lastValidated=1589648924489 lastCheckedOut=1589649243527 trackByTx=false pool=org.jboss.jca.core.connectionmanager.pool.strategy.OnePool@5755db92 mcp=SemaphoreConcurrentLinkedQueueManagedConnectionPool@7c0f33f2[pool=OAPIDS] xaResource=LocalXAResourceImpl@2e150b3f[connectionListener=43697861 connectionManager=180e08c1 warned=false currentXid=null productName=PostgreSQL productVersion=9.5.14 jndiName=java:/OAPIDS] txSync=null]
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.reconnectManagedConnection(AbstractConnectionManager.java:975)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.allocateConnection(AbstractConnectionManager.java:792)
at org.jboss.jca.adapters.jdbc.WrapperDataSource.getConnection(WrapperDataSource.java:138)
... 105 more
Caused by: javax.resource.ResourceException: IJ000461: Could not enlist in transaction on entering meta-aware object
at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.managedConnectionReconnected(TxConnectionManagerImpl.java:561)
at org.jboss.jca.core.connectionmanager.AbstractConnectionManager.reconnectManagedConnection(AbstractConnectionManager.java:970)
... 107 more
Caused by: java.lang.IllegalStateException: Transaction Local transaction (delegate=TransactionImple < ac, BasicAction: 0:ffffc0a8cf9f:1902a63b:5ebfdd0d:c3e3c status: ActionStatus.ABORTED >, owner=Local transaction context for provider JBoss JTA transaction provider) is not active STATUS_ROLLEDBACK
at org.jboss.jca.core.connectionmanager.listener.TxConnectionListener.enlist(TxConnectionListener.java:296)
at org.jboss.jca.core.connectionmanager.tx.TxConnectionManagerImpl.managedConnectionReconnected(TxConnectionManagerImpl.java:554)
... 108 more