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From GitBox <...@apache.org>
Subject [GitHub] kpm1985 commented on issue #1004: FLUO-1000 OracleServer race conditions
Date Thu, 01 Jan 1970 00:00:00 GMT
kpm1985 commented on issue #1004: FLUO-1000 OracleServer race conditions
URL: https://github.com/apache/fluo/pull/1004#issuecomment-359928917
   Apologies for the quality of type to text doesn't seem to be showing me
   much love today.
   I saw the curator issue that was put out and took a look at it that's cool.
   Wanted to say that I did throw a few statements in to print the curator
   statement before exceptions were thrown. I saw during all of the exceptions
   the state of the curator framework was stopped not latent but stopped.
   I think most of these errors are happening due to the 5th test in OracleIT.
   It does a lot of oserver.stop oserver.start stuff.
   Apologies for the type to text.
   On Jan 23, 2018 12:56 PM, "Kenneth Mcfarland" <kennethmcfarland@apache.org>
   > Hi Keith,
   > About the errors that show during my verify. My original solution I sit
   > and check curator state inside of the function takeLadership and wait until
   > its ready.
   > I tried moving this check to the start method and I ran Maven verify on
   > this a few times and to my surprise I kept getting some exceptions on the
   > state of that curator framework again.
   > So what I did is I left it in that method that is called by leader
   > selector and when the check is in that method with a couple other checks
   > like this synchronized on the leader variable then the errors are not
   > present.
   > This made me wonder after tracing the flow of what I thought was going on
   > in Oracle server, well what the heck is happening somebody else is screwing
   > with something in the background thread somewhere so, I still didn't really
   > understand what was going on but I left the check inside of the i, I still
   > didn't really understand what was going on but I left the check inside of
   > the is take leadership method.
   > My only thought is possibly multiple instances but I thought those were
   > private variables so not exactly sure what's going on with that.
   > Anyways I really appreciate you responding and looking into this with me
   > this is the help I totally needed. I'm on break with the phone so I
   > apologize for not highlighting code and doing other things that you can do
   > on a computer.
   > On Jan 23, 2018 8:42 AM, "Keith Turner" <notifications@github.com> wrote:
   >> Maybe we don't need to verify that the illegal state came from curator.
   >> We could make the check stronger, something like the following.
   >>  } catch (IllegalStateException e) {
   >>       if(curatorFramework.getState() == STOPPED && !started) {
   >>         // the oracle server had been stopped, do not care much about errors...
lets suppress the exception
   >>         log.debug(...);  log a debug message that this happened
   >>       } else {
   >>         throw e;
   >>       }
   >>     }
   >> ?
   >> You are receiving this because you were mentioned.
   >> Reply to this email directly, view it on GitHub
   >> <https://github.com/apache/fluo/pull/1004#issuecomment-359852270>, or mute
   >> the thread
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   >> .

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