cambyzju opened a new pull request, #14556:
URL: https://github.com/apache/doris/pull/14556
# Proposed changes
Issue Number: close #xxx
## Problem summary
Problem:
We got following error frequently while `SELECT xxx INTO OUTFILE`:
`ERROR 1064 (HY000): RpcException, msg: Fail to write to broker,
broker:TNetworkAddress(hostname=a.b.c.d, port=8111) failed:write() send():
Broken pipe`
Reason:
1. we cache broker thrift client in BE;
2. thrift client check connect `isOpen` only return cached flag, not care
the real socket is opened or closed;
3. after we get client from cache, the socket may already closed, then
`pwrite` will failed.
How to fix:
Other interfaces such as open and close, will reopen and retry again, but
`pwrite` do not retry.
As there are write offset inside `pwrite`, and the broker(server) side also
will check the write offset, it is safe to retry `pwrite`.
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [ ] No
- [ ] I don't know
4. Has unit tests been added:
- [ ] Yes
- [ ] No
- [ ] No Need
5. Has document been added or modified:
- [ ] Yes
- [ ] No
- [ ] No Need
6. Does it need to update dependencies:
- [ ] Yes
- [ ] No
7. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [ ] No
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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