Sanil15 opened a new pull request #1170: Samza-2330: Handle expired resource request for Container allocator when host affinity is disabled URL: https://github.com/apache/samza/pull/1170 **Summary of the problem**: Today when host affinity is not enabled & Cluster Manager does not issue the requested resources, the allocator thread keeps on looping forever, we want to add an expiry check for such requests to re-issue another ANY_HOST just in case if capacity is later added This PR introduces expiry check for container allocator when host affinity is disabled. Expiry timeout is defined by the existing config: `cluster-manager.container.request.timeout.ms` with a default of 5 mins. **Note**: This is a Stacked PR which is the third in series of: 1. [SAMZA-2319: [1/2] Simplify Container Allocation logic](https://github.com/apache/samza/pull/1152) 2. [SAMZA-2319: [2/2] Simplify Container Allocation logic : Rename AbstractContainerAllocator to ContainerAllocator](https://github.com/apache/samza/pull/1169) For the ease of reviewing please review the commits onwards from: https://github.com/apache/samza/commit/c0b036b4b212b0e5820c9598d1fbc1f82aa29960
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