lraczko commented on PR #984:
URL: https://github.com/apache/activemq/pull/984#issuecomment-1580192390
When you have configuration like:
`<persistenceAdapter>
<mKahaDB directory="${activemq.data}/kahadb">
<filteredPersistenceAdapters>
<!-- kahaDB per destinations -->
<filteredKahaDB perDestination="true">
<persistenceAdapter>
<kahaDB>
...
</kahaDB>
</persistenceAdapter>
</filteredKahaDB>
<filteredKahaDB topic="STOMP.>">
<persistenceAdapter>
<kahaDB>
...
</kahaDB>
</persistenceAdapter>
</filteredKahaDB>
</filteredPersistenceAdapters>
</mKahaDB>
</persistenceAdapter>
`
On first start everything works fine, but after restart in
_org.apache.activemq.store.kahadb.MultiKahaDBPersistenceAdapter#doStart_
you first go through 'matchAll' and for this example topic store in
_org.apache.activemq.store.kahadb.MultiKahaDBPersistenceAdapter#registerExistingAdapter_
you register and start adapter (as destinations.size() != 0)
and when you get to
` File[] candidates =
template.getPersistenceAdapter().getDirectory().listFiles(destinationNames);
if (candidates != null) {
for (File candidate : candidates) {
registerExistingAdapter(template, candidate);
}
}`
in mentioned 'doStart' then it will try to register same adapter second time
and corrupt index.
And after that another restart will make AMQ fail to start because of that
corrupted index.
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