[jira] [Created] (OAK-1260) Using multiple cluster nodes can corrupt the data

["Thomas Mueller (JIRA)" <ji...@apache.org>]

Thomas Mueller created OAK-1260:
-----------------------------------

             Summary: Using multiple cluster nodes can corrupt the data
                 Key: OAK-1260
                 URL: https://issues.apache.org/jira/browse/OAK-1260
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: mongomk
            Reporter: Thomas Mueller


When using multiple cluster nodes, the node data stored in MongoDB can get corrupt. Unfortunately, there is no reproducible test case so far; we only have the corrupt data so far.

It looks like the node was added by cluster node 1 in r142b9051a3e-0-1, then removed _twice_ by cluster node 2 in revisions r142b9064ef5-0-2 and r142b9064f10-0-2, then re-added by cluster node 1 in revision r142b9065acd-0-1, but the properties were not set.

The result was that the node is now there, but the primary type is missing (this is the error that Oak core was reporting).

{code}
db.nodes.find({_id:"5:/var/discovery/impl/establishedView/fc3b22dc-951e-4268-8c65-354462ea9a10"}).pretty()
{
     ":source-path" : {
         "r142b9051a46-0-1" :
"\"/var/discovery/impl/ongoingVotings/fc3b22dc-951e-4268-8c65-354462ea9a10\""
     },
     "_children" : true,
     "_commitRoot" : {
         "r142b9051a3e-0-1" : "0",
         "r142b9051a46-0-1" : "0",
         "r142b9064ef5-0-2" : "0",
         "r142b9064f10-0-2" : "0",
         "r142b9065acd-0-1" : "0"
     },
     "_deleted" : {
         "r142b9051a3e-0-1" : "false",
         "r142b9064ef5-0-2" : "true",
         "r142b9064f10-0-2" : "true",
         "r142b9065acd-0-1" : "false"
     },
     "_id" :
"5:/var/discovery/impl/establishedView/fc3b22dc-951e-4268-8c65-354462ea9a10",
     "_lastRev" : {
         "r0-0-1" : "r142b9065acd-0-1",
         "r0-0-2" : "r142b9064f4a-0-2"
     },
     "_modCount" : NumberLong(8),
     "_modified" : NumberLong(277216734),
     "jcr:created" : {
         "r142b9051a3e-0-1" : "\"dat:2013-12-03T16:13:08.599+01:00\""
     },
     "jcr:createdBy" : {
         "r142b9051a3e-0-1" : "\"admin\""
     },
     "jcr:primaryType" : {
         "r142b9051a3e-0-1" : "\"nam:sling:Folder\""
     },
     "leaderElectionId" : {
         "r142b9051a3e-0-1" :
"\"0_0000001386083588359_dd63c091-ca18-41ee-9175-bffd28fee500\""
     },
     "leaderId" : {
         "r142b9051a3e-0-1" : "\"dd63c091-ca18-41ee-9175-bffd28fee500\""
     },
     "promotedAt" : {
         "r142b9051a3e-0-1" : "\"dat:2013-12-03T16:13:08.668+01:00\""
     },
     "votingStart" : {
         "r142b9051a3e-0-1" : "\"dat:2013-12-03T16:13:08.618+01:00\""
     }
}
{code}



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