[BOOKKEEPER-531] Cache thread should wait until old entries are collected

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.2.0
• Component/s: hedwig-server
• Assignee: Sijie Guo
• Reporter: Sijie Guo
• Created: 05/Jan/13 08:04
• Updated: 13/Feb/13 15:46
• Resolved: 09/Jan/13 11:30

Description

Ivan commented this issue in BOOKKEEPER-461, but seems that the last patch I attached doesn't address this comment.

https://issues.apache.org/jira/browse/BOOKKEEPER-461?focusedCommentId=13503945&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13503945

so when publish speed is larger than deliver/consume speed, it might overwhelm readAhead cache and putting lots of collectOldEntries operations in request queue, finally it OOM.

Issue Links

• relates to: BOOKKEEPER-461 Delivery throughput degrades when there are lots of publishers w/ high traffic.