1156
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Ran 26 Sep 2016 02:34AM UTC

Jobs 1

Files 252

Run time 11s

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Build # 1156

Build Type

Pull #365

travis-ci

Committed by

web-flow

Commit Message

Add jitter backoff strategies for spreading reconnection timing

When users use exponential backoff streategy and connection pool with more than thousands of application servers, sometimes connection bursting is occured in Redis instance.
Because it's reconnection timings are all same when Redis server is under slowlog or network problem.
This patch will fix the problem using well known jitter backoff strategies.

Equal Jitter

    sleep = random_between(0, min(cap, base * 2 ** attempt))

Full Jitter

    temp = min(cap, base * 2 ** attempt)
    sleep = temp / 2 + random_between(0, temp / 2)

Decorrelated Jitter

    sleep = min(cap, random_between(base, sleep * 3))

Rerenrence: https://www.awsarchitectureblog.com/2015/03/backoff.html

Pull Request Pull Request #365: Add jitter backoff strategies for spreading reconnection timing

Run Details

10406 of 11210 relevant lines covered (92.83%)

0.93 hits per line

Uncovered Existing Lines

Lines	Coverage	File
1	100.0	src/main/java/com/lambdaworks/redis/cluster/topology/TopologyComparators.java
10	100.0	src/main/java/com/lambdaworks/redis/resource/DefaultClientResources.java
13	100.0	src/main/java/com/lambdaworks/redis/protocol/RedisStateMachine.java
15	100.0	src/main/java/com/lambdaworks/redis/protocol/ConnectionWatchdog.java

Jobs

ID	Job ID	Ran	Files	Coverage
2	1156.2 (PROFILE=netty-41)	26 Sep 2016 02:34AM UTC	0	92.83	Travis Job 1156.2

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