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Subject [GitHub] [fluo] kpm1985 commented on issue #1088: Use LeaderLatch to determine if oracle exists
Date Sat, 07 Mar 2020 22:27:00 GMT
kpm1985 commented on issue #1088: Use LeaderLatch to determine if oracle exists
URL: https://github.com/apache/fluo/pull/1088#issuecomment-596143707
 
 
   Hello,
   
   Ive been out for a while with health issues sapping energy but saw this.
   
   Keith should remember a very similar race condition we tracked to Curator.
   
   When we changed the recipe it fixed the race condition. It should be
   documented on GitHub.
   
   
   
   
   
   On Fri, Mar 6, 2020, 7:01 PM Keith Turner <notifications@github.com> wrote:
   
   > *@keith-turner* commented on this pull request.
   > ------------------------------
   >
   > In
   > modules/core/src/main/java/org/apache/fluo/core/client/FluoAdminImpl.java
   > <https://github.com/apache/fluo/pull/1088#discussion_r389191104>:
   >
   > >    }
   >
   >    public boolean oracleExists() {
   >      return oracleExists(getAppCurator());
   >    }
   >
   > -  public int numOracles() {
   > -    CuratorFramework curator = getAppCurator();
   > -    if (oracleExists(curator)) {
   > -      try {
   > +  public static int numOracles(CuratorFramework curator) {
   > +    int numOracles = 0;
   > +    try {
   > +      if (curator.checkExists().forPath(ZookeeperPath.ORACLE_SERVER) != null) {
   >
   > @jkosh44 <https://github.com/jkosh44> I would be happy to open an issue
   > for numWorkers unless you are interested in doing that
   >
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