[jira] [Created] (TS-1963) upgrade the version number for cache between 3.2.0 and 3.4.0

["Bryan Call (JIRA)" <ji...@apache.org>]

Bryan Call created TS-1963:
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             Summary: upgrade the version number for cache between 3.2.0 and 3.4.0
                 Key: TS-1963
                 URL: https://issues.apache.org/jira/browse/TS-1963
             Project: Traffic Server
          Issue Type: Bug
          Components: Cache
            Reporter: Bryan Call


If you don't remove the cache between versions I have seen weird behavior on trying to get locks for reading from cache:

perf top output:
{code}
Samples: 379K of event 'cycles', Event count (approx.): 159277054084
 20.54%  libpthread-2.12.so        [.] pthread_mutex_trylock
 10.59%  traffic_server            [.] CacheVC::openReadStartHead(int, Event*)
  5.49%  traffic_server            [.] MutexTryLock::MutexTryLock(ProxyMutex*, EThread*)
  3.39%  libtsutil.so.3            [.] ink_freelist_new
  3.17%  traffic_server            [.] EThread::process_event(Event*, int)
  3.06%  [kernel]                  [k] _spin_lock_bh
  2.56%  libtsutil.so.3            [.] ink_freelist_free
  1.48%  [kernel]                  [k] _spin_lock
  1.46%  traffic_server            [.] EThread::execute()
  1.44%  libpthread-2.12.so        [.] pthread_mutex_unlock
  1.33%  [kernel]                  [k] copy_user_generic_string
  1.22%  traffic_server            [.] Ptr<ProxyMutex>::operator=(ProxyMutex*)
{code}

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