From 141a81796affaf6260201d3b91cf5be0e5b89e8b Mon Sep 17 00:00:00 2001 From: Brad Chamberlain Date: Thu, 27 Feb 2025 18:24:51 -0800 Subject: [PATCH] Update UDP docs to mention "DNSLookup" error and `CHPL_RT_MASTERIP` This error was sufficiently unfamiliar to me that it would not have occurred to me to apply this fix, and I didn't see any indication of it in our docs, so added this section to capture it and the fix. I've had this edit sitting in my tree for a few days now, but am pushing it tonight to fire off another smoke test. --- Signed-off-by: Brad Chamberlain --- doc/rst/platforms/udp.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/doc/rst/platforms/udp.rst b/doc/rst/platforms/udp.rst index e3be806f12f8..89996af0f902 100644 --- a/doc/rst/platforms/udp.rst +++ b/doc/rst/platforms/udp.rst @@ -182,4 +182,9 @@ the local machine, use: export CHPL_RT_MASTERIP=127.0.0.1 export CHPL_RT_WORKERIP=127.0.0.0 # may be optional +I get ``worker failed DNSLookup on master host name`` error messages +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +When running in a local, oversubscribed setting, this error can often +be resolved by setting ``CHPL_RT_MASTER_IP`` as described in the +previous section.