In Cassandra 3.11.12, logback was upgraded from 1.1.3 to 1.2.9, and as a result the logstash appender is no longer setting the HOSTNAME property. This has been worked around in r803978 with the use of a custom field. We should however investigate whether a better solution is available, (and verify that the appender we are using is still maintained, and up to date).
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- Mentioned Here
- T350567: Migrate Cassandra to Java 11
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We tripped over this again when upgrading from Java 8 to Java 11 (T350567), when ${HOSTNAME} was no longer the fully-qualified version. We rolled out r1042273 which simply templates the fully-qualified domain name using Puppet. I think this is a completely reasonable (read permanent) fix, so I will close this now.