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https://issues.apache.org/jira/browse/GEODE-1986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15564311#comment-15564311
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John Blum commented on GEODE-1986:
----------------------------------
In order to reproduce this problem (manually), you can run the attached {{App}}
Java class. You must start 2 instances where the 2nd instance connects to the
first instance by way of a embedded Locator that runs in the first instance.
Run the first instance with the following command-line...
{code}
$java example.App -Dgemfire.name=Server1
-Dgemfire.start-locator=localhost[10334]
{code}
Then start the second instance with this command-line...
{code}
-Dgemfire.name=Server2 -Dgemfire.locators=localhost[10334]
{code}
Witness the problem!
This test case should be rather easy to implement in an automated test. I
actually caught this bug in SD Geode's test suite when upgrading the dependency
on Apache Geode to {{1.1.0-incubating-SNAPSHOT}}.
> The Cluster Configuration Service must absolutely not be required to run
> Geode.
> -------------------------------------------------------------------------------
>
> Key: GEODE-1986
> URL: https://issues.apache.org/jira/browse/GEODE-1986
> Project: Geode
> Issue Type: Bug
> Components: configuration
> Reporter: John Blum
> Priority: Critical
> Labels: ClusterConfig, ClusterConfigurationService
> Fix For: 1.0.0-incubating
>
> Attachments: App.java
>
>
> A bug was introduced when the logic to fetch the Cluster Configuration
> meta-data from the Locator in the cluster by a member was refactored into
> it's own
> [class|https://github.com/apache/incubator-geode/blob/develop/geode-core/src/main/java/org/apache/geode/internal/cache/ClusterConfigurationLoader.java]
> causing the following issues...
> 1. First, and foremost, the _Cluster Configuration_ service is now, seemingly
> no longer *optional* (hence, _required_), which is both short sighted and too
> restrictive, and will break existing [embedded Geode application]
> deployments, particularly in situations where GemFire config, and especially,
> _Gfsh_ were not used to configure the cluster, which will be true when users
> upgrade existing clusters based on an earlier versions of Apache Geode
> (namely GemFire < v7.0, once GemFire 9 is based on Apache Geode) and as well
> as _Spring_ applications.
> This change is apparent from the removal of the [conditional check on the
> Geode System property
> (1)|https://github.com/apache/incubator-geode/blob/rel/v1.0.0-incubating.M3/geode-core/src/main/java/com/gemstone/gemfire/internal/cache/GemFireCacheImpl.java#L956-L958],
> which is no longer present [here
> (2)|https://github.com/apache/incubator-geode/blob/develop/geode-core/src/main/java/org/apache/geode/internal/cache/ClusterConfigurationLoader.java#L184-L233]
> or possibly [here
> (3)|https://github.com/apache/incubator-geode/blob/develop/geode-core/src/main/java/org/apache/geode/internal/cache/GemFireCacheImpl.java#L976-L981].
> 2. This does not work in the embedded Locator case. If a user configures a
> peer Cache using the following in his/her application...
> {code:java}
> ... = new CacheFactory()
> .set("name", "Example")
> .set("start-locator", "localhost[10334]")
> ...
> .create();
> {code}
> And another members joins, the logic in (2) above, will fail with...
> {code:java}
> Caused by: org.apache.geode.GemFireConfigException: cluster configuration
> service not available
> at
> org.apache.geode.internal.cache.GemFireCacheImpl.requestSharedConfiguration(GemFireCacheImpl.java:1009)
> at
> org.apache.geode.internal.cache.GemFireCacheImpl.initialize(GemFireCacheImpl.java:1135)
> at
> org.apache.geode.internal.cache.GemFireCacheImpl.basicCreate(GemFireCacheImpl.java:771)
> at
> org.apache.geode.internal.cache.GemFireCacheImpl.create(GemFireCacheImpl.java:758)
> at org.apache.geode.cache.CacheFactory.create(CacheFactory.java:181)
> at org.apache.geode.cache.CacheFactory.create(CacheFactory.java:231)
> ... 42 more
> Caused by:
> org.apache.geode.internal.process.ClusterConfigurationNotAvailableException:
> Unable to retrieve cluster configuration from the locator.
> at
> org.apache.geode.internal.cache.ClusterConfigurationLoader.requestConfigurationFromLocators(ClusterConfigurationLoader.java:229)
> at
> org.apache.geode.internal.cache.GemFireCacheImpl.requestSharedConfiguration(GemFireCacheImpl.java:981)
> ... 47 more
> {code}
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