[infinispan-issues] [JBoss JIRA] (ISPN-4890) Entry iterator should throw AvailabilityException in degraded mode

[Dan Berindei (JIRA)]

Dan Berindei created ISPN-4890:
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             Summary: Entry iterator should throw AvailabilityException in degraded mode
                 Key: ISPN-4890
                 URL: https://issues.jboss.org/browse/ISPN-4890
             Project: Infinispan
          Issue Type: Bug
          Components: Core, Test Suite - Core
    Affects Versions: 7.0.0.CR2
            Reporter: Dan Berindei
            Assignee: William Burns
            Priority: Blocker
             Fix For: 7.0.0.Final


When the distributed entry iterator gets a suspect exception, it assumes that the CH will be soon updated to remove the leaver, and retries to contact the primary owner of the segment.

But if the cache is in degraded mode, the consistent hash is no longer updated, and the entry iterator enters an infinite loop.

{noformat}
11:58:35,622 TRACE (testng-DelayedAvailabilityUpdateTest:) [DistributedEntryRetriever] Request to NodeC-51013=[50, 51, 20, 52, 21, 53, 22, 54, 23, 24, 25, 26, 27, 28, 29] for cd886604-960b-431a-81a0-efbb51eed57f was suspect, must resend to a new node!
11:58:35,622 TRACE (testng-DelayedAvailabilityUpdateTest:) [DistributedEntryRetriever] Request to NodeC-51013=[50, 51, 20, 52, 21, 53, 22, 54, 23, 24, 25, 26, 27, 28, 29] for cd886604-960b-431a-81a0-efbb51eed57f was suspect, must resend to a new node!
11:58:35,622 TRACE (testng-DelayedAvailabilityUpdateTest:) [DistributedEntryRetriever] Request to NodeC-51013=[50, 51, 20, 52, 21, 53, 22, 54, 23, 24, 25, 26, 27, 28, 29] for cd886604-960b-431a-81a0-efbb51eed57f was suspect, must resend to a new node!
...
{noformat}

This is visible when running the partition handling tests (e.g. DelayedAvailabilityUpdateTest) with trace logging enabled, as {{TestingUtil.killCaches()}} logs the cache contents at trace level. As an aside, {{TestingUtil.killCaches()}} should probably use {{Flag.CACHE_MODE_LOCAL}} to print only the entries on each node.



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