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https://issues.apache.org/jira/browse/NIFI-4774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16373414#comment-16373414
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ASF GitHub Bot commented on NIFI-4774:
--------------------------------------
Github user mattyb149 commented on a diff in the pull request:
https://github.com/apache/nifi/pull/2487#discussion_r170084710
--- Diff:
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core/src/main/java/org/apache/nifi/controller/repository/WriteAheadFlowFileRepository.java
---
@@ -129,17 +138,22 @@ public WriteAheadFlowFileRepository() {
checkpointDelayMillis = 0l;
numPartitions = 0;
checkpointExecutor = null;
- flowFileRepositoryPath = null;
+ walImplementation = null;
--- End diff --
Should this be DEFAULT_WAL_IMPLEMENTATION?
> FlowFile Repository should write updates to the same FlowFile to the same
> partition
> -----------------------------------------------------------------------------------
>
> Key: NIFI-4774
> URL: https://issues.apache.org/jira/browse/NIFI-4774
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Major
> Fix For: 1.6.0
>
>
> As-is, in the case of power loss or Operating System crash, we could have an
> update that is lost, and then an update for the same FlowFile that is not
> lost, because the updates for a given FlowFile can span partitions. If an
> update were written to Partition 1 and then to Partition 2 and Partition 2 is
> flushed to disk by the Operating System and then the Operating System crashes
> or power is lost before Partition 1 is flushed to disk, we could lose the
> update to Partition 1.
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