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https://issues.apache.org/jira/browse/CASSANALYTICS-124?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jyothsna Konisa updated CASSANALYTICS-124:
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Authors: Jyothsna Konisa
Test and Documentation Plan: Added unit testing and verified fix with CCM
and stress test.
Status: Patch Available (was: Open)
> Commitlog reading not progressing in CDC due to incorrect
> CommitLogReader.isFullyRead
> --------------------------------------------------------------------------------------
>
> Key: CASSANALYTICS-124
> URL: https://issues.apache.org/jira/browse/CASSANALYTICS-124
> Project: Apache Cassandra Analytics
> Issue Type: Improvement
> Components: CDC
> Reporter: Jyothsna Konisa
> Assignee: Jyothsna Konisa
> Priority: Normal
> Fix For: 0.4
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In the CDC code path after all the commit logs are listed, CdcScannerBuilder
> opens commit logs one by one and the commit log reading is not progressing
> after reading the first one for the following reasons.
> CommitLogReader.isFullyRead() incorrectly returns false even when the commit
> log is fully in following scenarios.
> 1. After the restart when the CDC state is loaded,
> BufferingCommitLogReader.position is not updated to the marker.start position
> and remains 0 affecting the result of above method
> 2. While reading commit log segments with padded zeros, even after the commit
> log is read, the above method returns false.
> For both the issues the fix is setting the BufferingCommitLogReader.position
> correctly after loading the state and after finishing reading the segment.
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