[KAFKA-5872] Transient failure in SslSelectorTest.testMuteOnOOM

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.0.0
• Component/s: network
• Assignee: Rajini Sivaram
• Reporter: Rajini Sivaram
• Created: 12/Sep/17 09:04
• Updated: 12/Sep/17 16:41
• Resolved: 12/Sep/17 16:40

Description

There are a couple of issues:
1. `Selector.determineHandlingOrder()` currently doesn't clear selection keys when keys are shuffled. This can result in select returning zero even when there are ready keys, resulting in a tight loop of polls with no keys processed.
2. The test expects `Selector.isOutOfMemory()` to be set in a poll that waits only for 10ms. This is expecting two reads from two connections to be processed within 10ms of each other, which may not always be the case.

Error:

org.apache.kafka.common.network.SslSelectorTest > testMuteOnOOM FAILED
java.lang.AssertionError: could not initiate connections within timeout
at org.junit.Assert.fail(Assert.java:88)
at org.apache.kafka.common.network.SslSelectorTest.testMuteOnOOM(SslSelectorTest.java:236)

Issue Links

• links to: GitHub Pull Request #3836