Uwe Schindler created LUCENE-7595:
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Summary: RAMUsageTester in test-framework and static field checker
no longer works with Java 9
Key: LUCENE-7595
URL: https://issues.apache.org/jira/browse/LUCENE-7595
Project: Lucene - Core
Issue Type: Bug
Components: general/test
Reporter: Uwe Schindler
Assignee: Uwe Schindler
Lucene/Solr tests have a special rule that records memory usage in static
fields before and after test, so we can detect memory leaks. This check dives
into JDK classes (like java.lang.String to detect their size). As Java 9 build
148 completely forbids setAccessible on any runtime class, we have to change or
disable this check:
- As first step I will only add the rule to LTC, if we not have Java 8
- As a second step we might investigate how to improve this
[~rcmuir] had some ideas for the 2nd point:
- Don't dive into classes from JDK modules and instead "estimate" the size for
some special cases (like Strings)
- Disallow any static field in tests that is not final (constant) and points to
an Object except: Strings and native (wrapper) types.
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