[jira] [Created] (KUDU-1473) ProcessPendingAssignments accesses tablet metadata without a lock

["Todd Lipcon (JIRA)" <ji...@apache.org>]

Todd Lipcon created KUDU-1473:
---------------------------------

             Summary: ProcessPendingAssignments accesses tablet metadata without a lock
                 Key: KUDU-1473
                 URL: https://issues.apache.org/jira/browse/KUDU-1473
             Project: Kudu
          Issue Type: Bug
          Components: master
    Affects Versions: 0.9.0
            Reporter: Todd Lipcon
            Assignee: Adar Dembo


I've seen Java tests being flaky with this crash:

{code}
F0530 13:51:16.076247 30686 cow_object.h:82] Check failed: lock_.HasReaders() || lock_.HasWriteLock()
*** Check failure stack trace: ***
     @     0x7f8c52d0fe64  kudu::CowObject<>::state()
     @     0x7f8c52d0848b  kudu::master::AsyncCreateReplica::AsyncCreateReplica()
     @     0x7f8c52cf7af2  kudu::master::CatalogManager::SendCreateTabletRequests()
     @     0x7f8c52cf7375  kudu::master::CatalogManager::ProcessPendingAssignments()
     @     0x7f8c52ce4ad7  kudu::master::CatalogManagerBgTasks::Run()  
{code}

It seems like this code path doesn't acquire the read lock on the tablet, and thus fires the assertion



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