Hi all, We're working on a Kafka connector to capture data changes in Cassandra by processing commit log files in the cdc_raw directory. After we enabled CDC on a few tables, we didn't observe any commit log files getting flushed into cdc_raw directory as expected, but got WriteTimeoutException in Cassandra DB.
Here's how we reproduce the issue: 1. Our Cassandra Settings: - Cassandra Version: 3.11.9 - Related configs in Cassandra.yaml: - cdc_enabled: true - cdc_total_space_in_mb: 4096 - commitlog_segment_size_in_mb: 32mb - commitlog_total_space_in_mb: 8192 - commitlog_sync: periodic - commitlog_sync_period_in_ms: 10000 2. Enable CDC on a few tables by CQL: ALTER TABLE foo WITH cdc=true; 3. After a few days, we get *WriteTimeoutException* in Cassandra DB. However at the same time, cdc_raw directory is still empty with no commit log flushed/copied into it at all. I want to understand why there's no commit log file flushed into cdc_raw directory at all even when the threshold cdc_total_space_in_mb has been reached and write suspension has been triggered in Cassandra DB. This sounds like a bug and currently makes the CDC feature useless. Thanks so much, Bingqin Zhou
