[IGNITE-7749] testDiscoCacheReuseOnNodeJoin fails on TC

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.5
• Fix Version/s: 2.5
• Component/s: cache
• Labels: MakeTeamcityGreenAgain
• Assignee: Alexey Goncharuk
• Reporter: Pavel Kovalenko
• Created: 19/Feb/18 10:45
• Updated: 22/Feb/18 09:05
• Resolved: 22/Feb/18 09:03

Description

java.lang.ClassCastException: org.apache.ignite.internal.util.GridConcurrentHashSet cannot be cast to java.lang.String
    at org.apache.ignite.spi.discovery.IgniteDiscoveryCacheReuseSelfTest.assertDiscoCacheReuse(IgniteDiscoveryCacheReuseSelfTest.java:93)
    at org.apache.ignite.spi.discovery.IgniteDiscoveryCacheReuseSelfTest.testDiscoCacheReuseOnNodeJoin(IgniteDiscoveryCacheReuseSelfTest.java:64)

There are 2 problems in the test.

1) We don't wait for final topology version is set on all nodes and start checking discovery caches immediately after grids starting. It leads to possible NullPointerException while accessing to discovery caches history.
2) We don't use explicit assertEquals(String, Object, Object) related to comparing Objects, while Java can choose assertEquals(String, String) method to compare discovery cache fields which we're getting in runtime using reflection.

Issue Links

• links to: GitHub Pull Request #3540