[LENS-522] ConcurrentModificationException while doing parallel estimate

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.1
• Fix Version/s: 2.1
• Component/s: cube, server
• Assignee: Amareshwari Sriramadasu
• Reporter: Arshad Matin
• Created: 22/Apr/15 12:15
• Updated: 19/May/15 09:21
• Resolved: 27/Apr/15 05:23

Description

22 Apr 2015 11:14:46,755 [estimate-3] WARN  org.apache.lens.driver.cube.RewriteUtil  - Driver : org.apache.lens.driver.jdbc.JDBCDriver@4ebbd9cc Skipped for the query rewriting due to
java.util.ConcurrentModificationException
        at java.util.HashMap$HashIterator.nextEntry(HashMap.java:810)
        at java.util.HashMap$KeyIterator.next(HashMap.java:845)
        at org.apache.lens.cube.metadata.DerivedCube.getDimAttributeNames(DerivedCube.java:247)
        at org.apache.lens.cube.parse.FieldValidator.validateFields(FieldValidator.java:74)
        at org.apache.lens.cube.parse.FieldValidator.rewriteContext(FieldValidator.java:40)
        at org.apache.lens.cube.parse.CubeQueryRewriter.rewrite(CubeQueryRewriter.java:198)
        at org.apache.lens.cube.parse.CubeQueryRewriter.rewrite(CubeQueryRewriter.java:173)
        at org.apache.lens.cube.parse.CubeQueryRewriter.rewrite(CubeQueryRewriter.java:184)
        at org.apache.lens.driver.cube.RewriteUtil$DriverRewriterRunnable.run(RewriteUtil.java:305)
        at org.apache.lens.server.query.QueryExecutionServiceImpl$RewriteEstimateRunnable.run(QueryExecutionServiceImpl.java:1163)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1146)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:701)