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这个生产问题现在占据了我的头。我已经配置为使用 Bitronix 作为带有 jBPM5 工具的事务管理器。它在很长一段时间内都可以正常工作，但突然开始出现以下异常。

异常堆栈跟踪 

Caused by: java.sql.SQLException: unable to get a connection from pool of a PoolingDataSource containing an XAPool of resource jdbc/jbpm-ds with 1 connection(s) (1 still available)
    at bitronix.tm.resource.jdbc.PoolingDataSource.getConnection(PoolingDataSource.java:262)
    at org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider.getConnection(InjectedDataSourceConnectionProvider.java:71)
    at org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
    ... 78 more
Caused by: bitronix.tm.internal.BitronixRuntimeException: cannot get valid connection from an XAPool of resource jdbc/jbpm-ds with 1 connection(s) (1 still available) after trying for 30s
    at bitronix.tm.resource.common.XAPool.getConnectionHandle(XAPool.java:160)
    at bitronix.tm.resource.common.XAPool.getConnectionHandle(XAPool.java:91)
    at bitronix.tm.resource.jdbc.PoolingDataSource.getConnection(PoolingDataSource.java:258)
    ... 80 more
Caused by: java.sql.SQLRecoverableException: IO Error: Connection timed out
    at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:899)
    at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1175)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1296)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3613)
    at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3657)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1495)
    at bitronix.tm.resource.jdbc.JdbcPooledConnection.testConnection(JdbcPooledConnection.java:215)
    at bitronix.tm.resource.jdbc.JdbcPooledConnection.getConnectionHandle(JdbcPooledConnection.java:299)
    at bitronix.tm.resource.common.XAPool.getConnectionHandle(XAPool.java:130)
    ... 82 more
Caused by: java.net.SocketException: Connection timed out
    at java.net.SocketInputStream.socketRead0(Native Method)
    at java.net.SocketInputStream.read(SocketInputStream.java:150)
    at java.net.SocketInputStream.read(SocketInputStream.java:121)
    at oracle.net.ns.Packet.receive(Packet.java:308)
    at oracle.net.ns.DataPacket.receive(DataPacket.java:106)
    at oracle.net.ns.NetInputStream.getNextPacket(NetInputStream.java:324)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:268)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:190)
    at oracle.net.ns.NetInputStream.read(NetInputStream.java:107)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.readNextPacket(T4CSocketInputStreamWrapper.java:124)
    at oracle.jdbc.driver.T4CSocketInputStreamWrapper.read(T4CSocketInputStreamWrapper.java:80)
    at oracle.jdbc.driver.T4CMAREngine.unmarshalUB1(T4CMAREngine.java:1137)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:350)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:208)
    at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:886)
    ... 90 more

奇怪的是应用程序有足够数量的 XA 连接在 XAPool 中可用。它需要连接，尝试连接，无法连接，只是丢弃连接并采取新的连接来处理。

SEVERE: unable to get a connection from pool of a PoolingDataSource containing an XAPool of resource jdbc/jbpm-ds with 9 connection(s) (9 still available)

SEVERE: unable to get a connection from pool of a PoolingDataSource containing an XAPool of resource jdbc/jbpm-ds with 8 connection(s) (8 still available)

SEVERE: unable to get a connection from pool of a PoolingDataSource containing an XAPool of resource jdbc/jbpm-ds with 7 connection(s) (7 still available)

任何人都可以从这个问题中恢复过来吗？

更新1：

经过一番尝试，我能够在本地重现相同的问题。一旦数据库连接被重置或我的应用程序和数据库之间的网络连接丢失，PoolingDataSource（由 Bitronix 提供）池中的池连接将变得无效。我的查询是为什么它无法自动恢复？有什么我们可以自动恢复或建立新连接的原因吗？

我正在使用btm版本2.1.4。

谢谢，马扬克

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1 回答 1

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我遇到了同样的问题，但这是由于用户权限。我的用户没有足够的权限，所以我遇到了这个问题。之后，我运行了下面提到的这 3 个命令来创建一个新用户，它对我有用。我希望，它可以帮助某人。

  1. CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password';
  2. 授予 * 上的所有特权。* TO 'newuser'@'localhost';
  3. 同花顺特权；
于 2022-01-13T16:37:57.590 回答