CODEWITHSUNDEEP
c#cachingignite
MasiumDev
MasiumDev

Reputation: 11

Apache Ignite, Cache ID conflict

I get this errors:

[19:55:26,107][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D12201, conflictingCacheName=IRE9P1D0Q201] [19:55:26,170][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D11301, conflictingCacheName=IRE9P1D0P301] [19:55:26,203][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D12101, conflictingCacheName=IRE9P1D0Q101] [19:55:26,227][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D12301, conflictingCacheName=IRE9P1D0Q301] [19:55:26,249][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D13001, conflictingCacheName=IRE9P1D0R001] [19:55:26,272][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D13201, conflictingCacheName=IRE9P1D0R201] [19:55:26,295][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D15101, conflictingCacheName=IRE9P1D0T101] [19:55:26,352][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D14001, conflictingCacheName=IRE9P1D0S001] [19:55:26,382][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D13101, conflictingCacheName=IRE9P1D0R101] [19:55:26,408][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D16001, conflictingCacheName=IRE9P1D0U001] [19:55:26,432][WARNING][disco-notifier-worker-#76][ClusterCachesInfo] Ignore cache start request. Cache ID conflict (change cache name) [cacheName=IRE9P1D14101, conflictingCacheName=IRE9P1D0S101]

Why?

Upvotes: 0

Views: 106

Answers (1)

Pavel Tupitsyn
Pavel Tupitsyn

Reputation: 8986

Ignite uses cache name hash code as a unique cache identifier for performance reasons.

In this case, we have a hash collision:

      System.out.println("IRE9P1D11301".hashCode()); // -885780178
      System.out.println("IRE9P1D0P301".hashCode()); // -885780178

And Ignite can't have two caches with the same id, hence the Cache ID conflict. The only way to fix this is to change one of the cache names.

Upvotes: 2

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