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Prasanna Ranganathan updated STORM-2639: ---------------------------------------- Description: This is a followup to STORM-2505 to fix a minor issue with the computation of numUncommittedOffsets in OffsetManager. was: Kafka maintains the spout progress (offsets for partitions) which can hold a value which no longer exists (or offset+1 doesn't exist) in the topic due to following reasons * Topology stopped processing (or died) & topic got compacted (cleanup.policy=compact) leaving offset voids in the topic. * Topology stopped processing (or died) & Topic got cleaned up (cleanup.policy=delete) and the offset. When the topology starts processing again (or restarted), the spout logic suggests that the next offset has to be (committedOffset+1) for the spout to make progress, which will never be the case as (committedOffset+1) has been removed from the topic and will never be acked. {code:title=OffsetManager.java|borderStyle=solid} if (currOffset == nextCommitOffset + 1) { // found the next offset to commit found = true; nextCommitMsg = currAckedMsg; nextCommitOffset = currOffset; } else if (currOffset > nextCommitOffset + 1) { LOG.debug("topic-partition [{}] has non-continuous offset [{}]. It will be processed in a subsequent batch.", tp, currOffset); } {code} A smart forwarding mechanism has to be built so as to forward the spout pivot to the next logical location, instead of a hardcoded single forward operation. > Kafka Spout incorrectly computes numCommittedOffsets due to voids in the > topic (topic compaction) > ------------------------------------------------------------------------------------------------- > > Key: STORM-2639 > URL: https://issues.apache.org/jira/browse/STORM-2639 > Project: Apache Storm > Issue Type: Bug > Components: storm-kafka-client > Affects Versions: 1.x > Reporter: Prasanna Ranganathan > Assignee: Vivek Mittal > Fix For: 2.0.0, 1.1.1, 1.2.0 > > > This is a followup to STORM-2505 to fix a minor issue with the computation of > numUncommittedOffsets in OffsetManager. -- This message was sent by Atlassian JIRA (v6.4.14#64029)