cyb70289 commented on pull request #12442:
URL: https://github.com/apache/arrow/pull/12442#issuecomment-1081374590


   DoGet tests passed (though `unknow address family: 0` ucx error messages are 
still there).
   DoPut tests failed, from below log, looks the uri mismatches between client 
and server.
   `UCX_NET_DEVICES=lo` does't help.
   In my /etc/hosts, there's a line `::1     localhost ip6-localhost 
ip6-loopback`, comment out this line resolves this issue.
   ```
   [----------] 7 tests from UcxDoPutTest
   [ RUN      ] UcxDoPutTest.TestInts
   ../src/arrow/flight/transport/ucx/ucx_server.cc:299: Listening on 
ucx://localhost:53801
   ../src/arrow/flight/transport/ucx/ucx_client.cc:115: Connecting to ::1:53801
   [1648525920.752906] [wls-arm-amp02:334812:0]            sock.c:660  UCX  
ERROR unknown address family: 0
   ../src/arrow/flight/transport/ucx/ucx_server.cc:464: 
[server][peer=::1:41396] Received connection request
   [1648525920.795996] [wls-arm-amp02:334812:1]            sock.c:325  UCX  
ERROR   connect(fd=85, dest_addr=::1:38191) failed: Connection refused
   ...
   ```


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