[jira] [Created] (KYLIN-4074) Exception in thread "Memcached IO over {MemcachedConnection to ..." java.lang.NullPointerException

[Temple Zhou (JIRA)]

Temple Zhou created KYLIN-4074:
----------------------------------

             Summary: Exception in thread "Memcached IO over 
{MemcachedConnection to ..." java.lang.NullPointerException
                 Key: KYLIN-4074
                 URL: https://issues.apache.org/jira/browse/KYLIN-4074
             Project: Kylin
          Issue Type: Bug
    Affects Versions: v2.6.2, v2.5.0, v2.4.0
            Reporter: Temple Zhou
            Assignee: Temple Zhou


This exception will lead to the failure of thread "Memcached IO over  
{MemcachedConnection to ...}",

so, the inputQueue of memcache client will be blocked, and every request will 
take 2000ms (timeout).

The log is as follows:

{code:log}
2019-07-01 15:21:24,039 INFO  [Query 
3f75c477-9c38-35bf-24a0-656459d9ebb1-212641] v2.CubeHBaseEndpointRPC:197 : 
Query-3f75c477-9c38-35bf-24a0-656459d9ebb1: no segment result is cached for 
segment:1102_pv_uv_users_di[20160701000000_20170101000000], take time:2000ms
{code}





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