lidavidm commented on pull request #12442:
URL: https://github.com/apache/arrow/pull/12442#issuecomment-1080586810
Odd. I'll see if I can replicate.
Two things stand out to me:
1. UCX appears to have been compiled without multi-thread support, we do
request this:
```
[1648461566.472887] [my-test-host:4147425:0] ucp_worker.c:2118 UCX
DIAG multi-threaded worker is requested, but library is built without
multi-thread support
```
What is `ucx_info -v`?
2. It appears after initial connect, something is trying to connect an IPv4
source address to an IPv6 destination address (I would think this is not
allowed?)
```
[1648462634.576737] [my-test-host:4152820:1] tcp_cm.c:96 UCX
DEBUG tcp_ep 0xffff8c567690: CLOSED -> CONNECTING for the
[127.0.0.1:37347]<->[::1:35635]:3 connection [-:Rx]
[1648462634.576759] [my-test-host:4152820:1] tcp_cm.c:96 UCX
DEBUG tcp_ep 0xffff8c567690: CONNECTING -> CONNECTING for the
[127.0.0.1:37347]<->[::1:35635]:3 connection [-:Rx]
[1648462634.576804] [my-test-host:4152820:1] sock.c:325 UCX
ERROR connect(fd=85, dest_addr=::1:35635) failed: Connection refused
[1648462634.576828] [my-test-host:4152820:1] wireup_cm.c:1203 UCX
WARN server ep 0xffff94561000 failed to connect to remote address on device
lo, tl_bitmap 0x40 0x0, status Destination is unreachable
```
Maybe try with `UCX_NET_DEVICES=lo`? (Not sure if that is related.)
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