[HIVE-12247] HiveServer2 in HTTP mode should print a relevant error message when its threadpool is configured such that it cannot create appropriate acceptor threads while starting up

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.1.0, 1.2.0
• Component/s: HiveServer2
• Assignee: Unassigned
• Reporter: Deepesh Khandelwal
• Created: 23/Oct/15 18:09
• Updated: 23/Oct/15 18:13

Description

When run in HTTP mode, HS2 uses embedded jetty. The number of acceptor threads created are based on this formula (http://grepcode.com/file/repo1.maven.org/maven2/org.eclipse.jetty.aggregate/jetty-plus/7.6.0.v20120127/org/eclipse/jetty/server/nio/SelectChannelConnector.java#80):

(Math.max(1,(Runtime.getRuntime().availableProcessors()+3)/4));

In cases where hive.server2.thrift.max.worker.threads is set to a lower value than the above, we should print out a relevant error message.