[SOLR-935] DataImportHandler: Add logging to record failure to acquire lock by DataImporter for a given request

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Fix Version/s: 4.9, 6.0
• Component/s: contrib - DataImportHandler

Environment

Java 6, Tomcat 6.0.18

• Assignee: Noble Paul
• Reporter: Karthik K
• Created: 22/Dec/08 19:42
• Updated: 29/Aug/20 20:16
• Resolved: 29/Aug/20 20:16

Description

There is a possibility of 2 threads to be in DataImporter:runCmd, until before importLock.tryLock() method and then depending on the scheduling - one of them is allowed to pass through from then .

We need to log the failure of the other as to unable to start because of the failure to acquire the mutex, to distinguish between successful start of import and failure to do so.

Issue Links

• is superceded by: SOLR-14783 Remove DIH from 9.0
• relates to: SOLR-972 EventListener-s creation changed from a per request ( full / delta-imports) scenario to once through the lifetime of the DIH plugin.