Chris M. Hostetter created SOLR-15628:
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Summary: SolrException.log doesn't pass Throwable to Logger
correctly
Key: SOLR-15628
URL: https://issues.apache.org/jira/browse/SOLR-15628
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Reporter: Chris M. Hostetter
Having recently started using JSON based logging, I noticed that in many code
paths situations where an error involving a "Throwable" are logged isn't
happening correctly (This is also noticeable using the default solr log4j2.xml
configuration - but only subtly)
The problem is that {{SolrException.log(...)}} has some very old (pre Solr 1.0,
certainly pre SLF4j/Log4j) and hackish logic/code in it to support
{{SolrException.ignorePatterns}} (which was designed for tests that wanted
"quieter" output when they were intentionally triggering error situations.
This logic "stringifies" the entire Throwable (including stack trace) to test
against any {{ignorePatterns}} that exist (even if there are no ignore
patterns) before handing the resulting string off to the {{loggger.error(...)}}
call -- _as a log message string_ - w/o the normal "structure" context of the
original Throwable instance.
This causes the full exception stack trace to come through as the log "message"
-- even in log appenders that have been configured to only log partial stack
trace details, or log them in special fields (ie: JSON Logging)
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