Martijn Koster created SOLR-13087:
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Summary: bin/solr's use of whoami can produce warnings
Key: SOLR-13087
URL: https://issues.apache.org/jira/browse/SOLR-13087
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: SolrCLI
Reporter: Martijn Koster
The {{bin/solr}} script uses {{whoami}} to determine if it is running as root.
That code is [here
|https://github.com/apache/lucene-solr/blob/master/solr/bin/solr#L1089]and was
introduced with [this commit
|https://github.com/apache/lucene-solr/commit/7561461f738a447856bb93b0a847b0200fff4c9c]for
SOLR-7826
This can produce a warning if the effective uid is not present in
{{/etc/passwd}}.
For example:
{{$ docker run -it -u 88888 bash bash -c 'whoami'}}
{{ whoami: unknown uid 88888}}
This is an unusual situation, but one I encountered and [worked
around|https://github.com/docker-solr/docker-solr/commit/8a4e236e93d6fcda3e33937b332d1911c1e7b8f8#diff-1578307c887a49e90a57418e653ad7f6R49]
The use of {{whoami}} can be avoided by using {{id -u}}, or better yet {{$UID
}}/ {{$EUID}} which is built into bash and thus also avoids a subshell
invocation. I'm not aware of any downside to this approach.
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