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From "Stefan Guggisberg (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OAK-272) every session login causes a mk.branch operation
Date Wed, 22 Aug 2012 13:59:42 GMT
Stefan Guggisberg created OAK-272:

             Summary: every session login causes a mk.branch operation
                 Key: OAK-272
                 URL: https://issues.apache.org/jira/browse/OAK-272
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: core
            Reporter: Stefan Guggisberg

here's the relevant stack trace (copied from OAK-267):
at org.apache.jackrabbit.mk.core.MicroKernelImpl.branch(MicroKernelImpl.java:508)
at org.apache.jackrabbit.oak.kernel.KernelNodeStoreBranch.<init>(KernelNodeStoreBranch.java:56)
at org.apache.jackrabbit.oak.kernel.KernelNodeStore.branch(KernelNodeStore.java:101)
at org.apache.jackrabbit.oak.core.RootImpl.refresh(RootImpl.java:160)
at org.apache.jackrabbit.oak.core.RootImpl.<init>(RootImpl.java:111)
at org.apache.jackrabbit.oak.core.ContentSessionImpl.getCurrentRoot(ContentSessionImpl.java:78)
at org.apache.jackrabbit.oak.jcr.SessionDelegate.<init>(SessionDelegate.java:94)
at org.apache.jackrabbit.oak.jcr.RepositoryImpl.login(RepositoryImpl.java:137)

while investigating OAK-267 i've noticed >40k empty branch commits all based on the same
head revision.
those branch commits seem to be unnecessary since they're all empty (i.e. not followed by
write operations).

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