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Marcel Reutegger commented on OAK-5238: --------------------------------------- So far I was only able to reproduce a problem with a DocumentNodeStore on MongoDB and an update limit lowered to 100. I guess a problem with in-memory only builders is less likely, but still possible. NodeBuilders in Oak are not thread-safe. > IndexCopier causes concurrent update on NodeBuilder > --------------------------------------------------- > > Key: OAK-5238 > URL: https://issues.apache.org/jira/browse/OAK-5238 > Project: Jackrabbit Oak > Issue Type: Bug > Components: lucene > Affects Versions: 1.2.3, 1.0.15, 1.4.0 > Reporter: Marcel Reutegger > Labels: candidate_oak_1_4 > Fix For: 1.6 > > Attachments: OAK-5238.patch > > > OAK-2247 introduced the copy-on-write feature for lucene index in Oak. This > feature may result in a NodeBuilder updated by multiple threads concurrently. > New index files are first stored on the local filesystem and then copied > asynchronously into the repository. At the same time the async index update > thread manipulates the node builders as well. > With MongoMK this results in unexpected conflicts and failed async index > updates. -- This message was sent by Atlassian JIRA (v6.3.4#6332)