[ https://issues.apache.org/jira/browse/HBASE-5097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ramkrishna.s.vasudevan updated HBASE-5097: ------------------------------------------ Priority: Major (was: Blocker) Changing the priority. > Coprocessor RegionObserver implementation without preScannerOpen and > postScannerOpen Impl is throwing NPE and so failing the system initialization. > --------------------------------------------------------------------------------------------------------------------------------------------------- > > Key: HBASE-5097 > URL: https://issues.apache.org/jira/browse/HBASE-5097 > Project: HBase > Issue Type: Bug > Components: coprocessors > Reporter: ramkrishna.s.vasudevan > > In HRegionServer.java openScanner() > {code} > r.prepareScanner(scan); > RegionScanner s = null; > if (r.getCoprocessorHost() != null) { > s = r.getCoprocessorHost().preScannerOpen(scan); > } > if (s == null) { > s = r.getScanner(scan); > } > if (r.getCoprocessorHost() != null) { > s = r.getCoprocessorHost().postScannerOpen(scan, s); > } > {code} > If we dont have implemention for postScannerOpen the RegionScanner is null > and so throwing nullpointer > {code} > java.lang.NullPointerException > at > java.util.concurrent.ConcurrentHashMap.put(ConcurrentHashMap.java:881) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.addScanner(HRegionServer.java:2282) > at > org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2272) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > org.apache.hadoop.hbase.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:364) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1326) > {code} > Making this defect as blocker.. Pls feel free to change the priority if am > wrong. Also correct me if my way of trying out coprocessors without > implementing postScannerOpen is wrong. Am just a learner. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira