[SOLR-6643] Core load silently aborted if missing schema has depenencies - LinkageErrors swollowed

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.10.1
• Fix Version/s: 5.0, 6.0
• Component/s: Schema and Analysis
• Labels: logging
• Assignee: Chris M. Hostetter
• Reporter: Jan Høydahl
• Created: 22/Oct/14 13:48
• Updated: 09/May/16 18:54
• Resolved: 08/Jan/15 19:53

Description

How to reproduce

1. Start with standard collection1 config
2. Add a field type to schema using the ICU contrib, no need for a field

   <fieldType name="text_icu" class="solr.TextField">
     <analyzer><tokenizer class="solr.ICUTokenizerFactory"/></analyzer>
   </fieldType>
   

3. cd example
4. mkdir solr/lib
5. cp ../contrib/analysis-extras/lucene-libs/lucene-analyzers-icu-4.10.1.jar solr/lib/
6. bin/solr -f
7. Core is not loaded, and no messages in log after this line

   ... INFO  org.apache.solr.schema.IndexSchema  – [collection1] Schema name=example
   

Note that we did not add the dependency libs from analysis-extras/lib, so we'd expect a ClassNotFoundException, but some way the initialization of schema aborts silently. The ICUTokenizerFactory is instansiated by reflection and I suspect that some exception is swallowed in AbstractPluginLoader#create()