Scooletz created CASSANDRA-6998:
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Summary: HintedHandoff - expired hints may block future hints
deliveries
Key: CASSANDRA-6998
URL: https://issues.apache.org/jira/browse/CASSANDRA-6998
Project: Cassandra
Issue Type: Bug
Components: Core
Environment: - cluster of two DCs: DC1, DC2
- keyspace using NetworkTopologyStrategy (replication factors for both DCs)
- heavy load (write:read, 100:1) with LOCAL_QUORUM using Java driver setup with
DC awareness, writing to DC1
Reporter: Scooletz
Fix For: 2.0.3
For tests purposes, DC2 was shut down for 1 day. The _hints_ table was filled
with millions of rows. Now, when _HintedHandOffManager_ tries to
_doDeliverHintsToEndpoint_ it queries the store with
QueryFilter.getSliceFilter which counts deleted (TTLed) cells and throws
org.apache.cassandra.db.filter.TombstoneOverwhelmingException.
Throwing this exception stops the manager from running compaction as it is run
only after successful handoff. This leaves the HH practically disabled till
administrator runs truncateAllHints.
Wouldn't it be nicer if on
org.apache.cassandra.db.filter.TombstoneOverwhelmingException run compaction?
That would remove TTLed hints leaving whole HH mechanism in a healthy state.
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