[ASTERIXDB-1426] NPE on Drop Feed if Exists

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: ING - Ingestion
• Labels: soon
• Assignee: Abdullah Alamoudi
• Reporter: Murtadha Makki Al Hubail
• Created: 06/May/16 05:57
• Updated: 08/Mar/18 04:28
• Resolved: 24/Jun/17 02:14

Description

If a feed doesn't exist and a "drop feed <name> if exists" is executed, a NPE is thrown.

To reproduce the issue, run the following statements:
drop dataverse test if exists;
create dataverse test;
use dataverse test;
drop feed test_feed if exists;

Here is the stacktrace:
java.lang.NullPointerException
at org.apache.asterix.app.external.FeedOperations.buildRemoveFeedStorageJob(FeedOperations.java:264)
at org.apache.asterix.aql.translator.QueryTranslator.handleDropFeedStatement(QueryTranslator.java:2103)
at org.apache.asterix.aql.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:358)
at org.apache.asterix.aql.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:254)
at org.apache.asterix.api.http.servlet.APIServlet.doPost(APIServlet.java:148)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:546)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:483)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:228)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:956)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:411)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:188)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:891)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:114)
at org.eclipse.jetty.server.Server.handle(Server.java:353)
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:598)
at org.eclipse.jetty.server.HttpConnection$RequestHandler.content(HttpConnection.java:1076)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:805)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)
at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:427)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:510)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.access$000(SelectChannelEndPoint.java:34)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:450)
at java.lang.Thread.run(Thread.java:745)