[LUCENE-10287] Add jdk.unsupported module to Luke startup script

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 9.0
• Component/s: luke
• Lucene Fields: New
• Assignee: Uwe Schindler
• Reporter: Uwe Schindler
• Created: 05/Dec/21 19:20
• Updated: 28/Aug/22 16:31
• Resolved: 03/Jan/22 14:03

Description

See my note on the JDK 9.0 release: When you start Luke (in module mode, as done by default), it won't use MMapDirectory when opening indexes. The reason is simple: It can't see sun.misc.Unsafe, which is needed to unmap mapped byte buffers. It will silently disable itsself (as it is not a hard dependency).

By default we should pass the "jdk.unsupported" module when starting Luke.

In case of a respin, this should be backported.

Issue Links

• split to: LUCENE-10342 Add (very limited) java.util.logging to Lucene Core
• links to: GitHub Pull Request #517
• links to: GitHub Pull Request #522