报错 FD_CLOSE

看log里经常出现该Error级别报错,但是不知道是什么原因,没有办法定位到有什么操作

log上下文:

2022-07-25 15:40:05.358730 <INFO> :New connection from ip = 192.168.1.46 port = 49957
2022-07-25 15:40:05.358730 <INFO> :Created a new socket connection. Number of connections: 3
2022-07-25 15:40:05.031630 <INFO> :New connection from ip = 192.168.1.46 port = 49953
2022-07-25 15:40:05.031630 <INFO> :Created a new socket connection. Number of connections: 2
2022-07-25 15:40:05.022660 <INFO> :Created a new socket connection. Number of connections: 1
2022-07-25 15:39:54.039276 <INFO> :RedologMgmt garbage collect finish and engine is OLAP
2022-07-25 15:39:47.986900 <INFO> :<ChunkMgmt::createVersionGc> ignore this time because NEED_CHECK_CREATE_VERSION flag is false.
2022-07-25 15:39:47.925106 <INFO> :cleanExpiredTransactionsOnMaster starts
2022-07-25 15:39:46.418591 <INFO> :Close a connection with index=1. Number of remaining connections: 0
2022-07-25 15:39:46.418591 <ERROR> :Received FD_CLOSE
2022-07-25 15:39:44.953797 <INFO> :RedologMgmt garbage collect finish and engine is OLAP
2022-07-25 15:39:27.735211 <INFO> :cleanExpiredTransactionsOnMaster starts
2022-07-25 15:39:24.777153 <INFO> :RedologMgmt garbage collect finish and engine is OLAP
2022-07-25 15:39:17.721012 <INFO> :no gc candidates, skip garbage collection
2022-07-25 15:39:17.721012 <INFO> :start cleaning garbage versions
2022-07-25 15:39:14.695676 <INFO> :RedologMgmt garbage collect finish and engine is OLAP
2022-07-25 15:39:10.650878 <INFO> :chunkNode clean closed transactions successfully.
2022-07-25 15:39:10.650878 <INFO> :IoTransactionMgmt::collectGarbage execute successfully.
2022-07-25 15:39:07.576622 <INFO> :cleanExpiredTransactionsOnMaster starts
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