apache nifi：hive关闭连接，工作流停止工作

Question

我注意到一些工作流程停止工作，因为连接池失去了与hive的连接，如果我停止然后重新启动连接池，任何工作。如何避免此问题仅适用于蜂巢？有人遇到过这个问题吗？

Answer 1

This is a bug, DBCP currently assumes the connections are valid, so it can return such a connection the next time the processor runs, causing the error you are seeing.

I think HiveConnectionPool would benefit from the same fix in NIFI-2381, and perhaps other DBCP settings to ensure only valid connections are returned/borrowed. I have written NIFI-2927 to cover this.

Unfortunately I believe the only workaround at present is to restart NiFi.