Chetan Mehrotra created OAK-6121:
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Summary: Add a metric to measure find document call resulting in
null
Key: OAK-6121
URL: https://issues.apache.org/jira/browse/OAK-6121
Project: Jackrabbit Oak
Issue Type: Task
Components: documentmk
Reporter: Chetan Mehrotra
Assignee: Chetan Mehrotra
Priority: Minor
Fix For: 1.8
At times some calls are often seen which result in findDocument call resulting
in null. In normal flow such occurrence should not be high. However due to way
some code is written this can result in higher number of such calls.
# As seen in OAK-5511 where code always looks for "oak:index" node under each
changed node
# In another case a caller may fetch a path as Item via {{Session#getItem}}
{noformat}
22.02.2017 12:36:33.832 *TRACE* [sling-oak-observation-149]
org.apache.jackrabbit.oak.plugins.document.DocumentStoreStats.perf findUncached
on key=8:/content/dam/test.png/jcr:content/renditions/original/jcr:primaryType,
isSlaveOk=false [took 0ms]
{noformat}
To check if this is happening we should have a metric defined to measure rate
of such calls
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