rmatharu commented on a change in pull request #903: SEP-19: Allocator changes
for standby-aware container allocation, and active container failover
URL: https://github.com/apache/samza/pull/903#discussion_r260920529
##########
File path:
samza-core/src/main/java/org/apache/samza/clustermanager/HostAwareContainerAllocator.java
##########
@@ -81,13 +87,27 @@ public void assignResourceRequests() {
if (expired) {
updateExpiryMetrics(request);
- if (resourceAvailableOnAnyHost) {
- log.info("Request for container: {} on {} has expired. Running on
ANY_HOST", request.getContainerID(), request.getPreferredHost());
- runStreamProcessor(request, ResourceRequestState.ANY_HOST);
+
+ if (standbyContainerManager.isPresent()) {
+
+ // if standby is enabled and an alternative-anyhost-resource is
available, we try to use it
+ if (resourceAvailableOnAnyHost) {
+
standbyContainerManager.get().handleExpiredResourceRequest(containerID,
request, Optional.of(peekAllocatedResource(ResourceRequestState.ANY_HOST)),
this, resourceRequestState);
+ } else {
+
standbyContainerManager.get().handleExpiredResourceRequest(containerID,
request, Optional.empty(), this, resourceRequestState);
Review comment:
Because the StandbyContainerManager has a single method to handle expired
requests, if there is no alternate resource on anyHost available, we invoke it
with an empty optional resource.
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