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https://issues.apache.org/jira/browse/OAK-4883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15546504#comment-15546504
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Timothee Maret commented on OAK-4883:
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[~alexparvulescu], [~frm] debugging the code with a default primary instance
(File nodestore, no custom blob store), it appears the reason there's no
{{BlobGCMBean}} is due to the fact that
{code}
store.getBlobStore()
{code}
returns {{null}} and therefor, the check at [0] can't be satisfied which cause
the {{BlobGCMBean}} not to be registered. This occurs with a standby instance
as well. Looking at the code and the change at [1], it seems to me that the
logic for the primary case has not changed and that the only way to have a
BlobGCMBean registered is to have a custom blob store configured.
Before digging further, could you help me understand whether it is expected
that the {{store.getBlobStore()}} may return null in some setups
[0]
https://github.com/apache/jackrabbit-oak/blob/2b6c2f5340f3b6485dda5c493f6343d232c883e9/oak-segment/src/main/java/org/apache/jackrabbit/oak/plugins/segment/SegmentNodeStoreService.java#L646
[1]
https://github.com/tmaret/jackrabbit-oak/commit/982bc43374a4564726b8b77454c3803b691bac24
> Missing BlobGarbageCollection MBean on standby instance
> -------------------------------------------------------
>
> Key: OAK-4883
> URL: https://issues.apache.org/jira/browse/OAK-4883
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: segment-tar, segmentmk
> Reporter: Alex Parvulescu
> Assignee: Timothee Maret
> Labels: gc
>
> The {{BlobGarbageCollection}} MBean is no longer available on a standby
> instance, this affects non-shared datastore setups (on a shared datastore
> you'd only need to run blob gc on the primary).
> This change was introduced by OAK-4089 (and backported to 1.4 branch with
> OAK-4093).
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