Christopher Bradford created CASSANDRA-16027:
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Summary: bin/cassandra may fail to execute in certain environments
due to unhandled output pipe
Key: CASSANDRA-16027
URL: https://issues.apache.org/jira/browse/CASSANDRA-16027
Project: Cassandra
Issue Type: Bug
Reporter: Christopher Bradford
While developing Docker images for C* 3.11.6 I noticed bin/cassandra failed to
start when executed with nohup in a container based Red Hat Universal Base
Image on Kubernetes. Curiously this issue could not be reproduced when simply
running the container on Docker. Instead it had to be scheduled within a k8s
pod.
Running an strace indicates the following:
{code:java}
[pid 3666026] write(2, "OpenJDK 64-Bit Server VM warning: ", 34) = -1 EPIPE
(Broken pipe) {code}
The issue occurs before the system.log file is created. After further digging
in to the command being run it was determined the bin/cassandra file was not
redirecting all output pipes. In this particular environment this leads to the
process going defunct and no Cassandra running.
{{The 4 lines starting with }}
{code:java}
exec $NUMACTL {code}
{{are not handling one of the outputs (stderr or stdout). As a workaround
suffixing each line with }}
{code:java}
> /var/log/cassandra/stdout.log 2> /var/log/cassandra/stderr.log
{code}
{{resolves the issue and Cassandra starts without any issues.}}
{{Rather than bake this into our containers the fix should make its way
upstream.}}
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