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Add option for disabling unclean leader election #53

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Add option for disabling unclean leader election #53

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5 changes: 5 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -189,6 +189,11 @@ with their default values, if any:
will create the path in ZK automatically; with earlier versions, you must
ensure it is created before starting brokers.

- `KAFKA_UNCLEAN_LEADER_ELECTION=(true|false)`, Default here: `false`
Favour availability over consistency by allowing a non-ISR replica to become
a leader for a partition, possibly losing writes. Disabled by default from
version `0.11.0.0`

JMX
---

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1 change: 1 addition & 0 deletions config/server.properties.template
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Expand Up @@ -76,5 +76,6 @@ inter.broker.protocol.version={{KAFKA_INTER_BROKER_PROTOCOL_VERSION}}
log.message.format.version={{KAFKA_LOG_MESSAGE_FORMAT_VERSION}}
message.max.bytes={{KAFKA_MESSAGE_MAX_BYTES}}
replica.fetch.max.bytes={{KAFKA_REPLICA_FETCH_MAX_BYTES}}
unclean.leader.election.enable={{KAFKA_UNCLEAN_LEADER_ELECTION}}

# vim:set filetype=jproperties
1 change: 1 addition & 0 deletions start.sh
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Expand Up @@ -30,6 +30,7 @@ cat /kafka/config/server.properties.template | sed \
-e "s|{{ZOOKEEPER_SESSION_TIMEOUT_MS}}|${ZOOKEEPER_SESSION_TIMEOUT_MS:-10000}|g" \
-e "s|{{KAFKA_MESSAGE_MAX_BYTES}}|${KAFKA_MESSAGE_MAX_BYTES:-1000012}|g" \
-e "s|{{KAFKA_REPLICA_FETCH_MAX_BYTES}}|${KAFKA_REPLICA_FETCH_MAX_BYTES:-1048576}|g" \
-e "s|{{KAFKA_UNCLEAN_LEADER_ELECTION}}|${KAFKA_UNCLEAN_LEADER_ELECTION:-false}|g" \
> /kafka/config/server.properties

# Kafka's built-in start scripts set the first three system properties here, but
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