Minor - P4 If you create a capped collection with {size: 0} in 2.7.0 or 2.6.1, you get a collection with storageSize of 4096. In master, you get a collection with storageSize of 0, which leads to an assert when you attempt to insert a document.
2.7.0:
> var myDB = db.getSiblingDB('newdb');
> myDB.dropDatabase();
{ "dropped" : "newdb", "ok" : 1 }
> myDB.createCollection('foo', {size: 0, capped:true});
{ "ok" : 1 }
> myDB.foo.storageSize();
4096
> myDB.foo.insert({});
WriteResult({ "nInserted" : 1 })
master:
> var myDB = db.getSiblingDB('newdb');
> myDB.dropDatabase();
{ "dropped" : "newdb", "ok" : 1 }
> myDB.createCollection('foo', {size: 0, capped:true});
{ "ok" : 1 }
> myDB.foo.storageSize();
0
> myDB.foo.insert({});
WriteResult({
"nInserted" : 0,
"writeError" : {
"code" : 8,
"errmsg" : "assertion src/mongo/db/diskloc.h:85"
}
})
Stack trace:
2014-05-12T16:47:15.750-0400 [conn1] Assertion failure !isNull() src/mongo/db/diskloc.h 85 2014-05-12T16:47:15.753-0400 [conn1] 0x10079b149 0x100744d4d 0x100732801 0x100563209 0x10058ece6 0x10058860f 0x1001064ac 0x10010614d 0x1001db4c4 0x1001d9bd3 0x1001d93ad 0x1001d7857 0x1001dfecf 0x1001ef4d9 0x1001f05e2 0x1001f1660 0x100435820 0x1002d0280 0x10000e544 0x100753af0 /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo15printStackTraceERSo+0x39) [0x10079b149] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo10logContextEPKc+0xcd) [0x100744d4d] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo12verifyFailedEPKcS1_j+0x1d1) [0x100732801] /Users/kk/code/mongo/mongo/./mongod(_ZNK5mongo19MmapV1ExtentManager9getExtentERKNS_7DiskLocEb+0x69) [0x100563209] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo19CappedRecordStoreV111allocRecordEPNS_21TransactionExperimentEii+0x56) [0x10058ece6] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo17RecordStoreV1Base12insertRecordEPNS_21TransactionExperimentEPKcii+0xcf) [0x10058860f] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo10Collection15_insertDocumentEPNS_21TransactionExperimentERKNS_7BSONObjEb+0x11c) [0x1001064ac] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo10Collection14insertDocumentEPNS_21TransactionExperimentERKNS_7BSONObjEb+0x23d) [0x10010614d] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo18WriteBatchExecutor13execOneInsertEPNS0_16ExecInsertsStateEPPNS_16WriteErrorDetailE+0x3d4) [0x1001db4c4] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo18WriteBatchExecutor11execInsertsERKNS_21BatchedCommandRequestEPSt6vectorIPNS_16WriteErrorDetailESaIS6_EE+0x383) [0x1001d9bd3] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo18WriteBatchExecutor11bulkExecuteERKNS_21BatchedCommandRequestEPSt6vectorIPNS_19BatchedUpsertDetailESaIS6_EEPS4_IPNS_16WriteErrorDetailESaISB_EE+0x1ad) [0x1001d93ad] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo18WriteBatchExecutor12executeBatchERKNS_21BatchedCommandRequestEPNS_22BatchedCommandResponseE+0x947) [0x1001d7857] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo8WriteCmd3runERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x24f) [0x1001dfecf] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo12_execCommandEPNS_7CommandERKSsRNS_7BSONObjEiRSsRNS_14BSONObjBuilderEb+0x29) [0x1001ef4d9] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo7Command11execCommandEPS0_RNS_6ClientEiPKcRNS_7BSONObjERNS_14BSONObjBuilderEb+0xc12) [0x1001f05e2] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo12_runCommandsEPKcRNS_7BSONObjERNS_11_BufBuilderINS_16TrivialAllocatorEEERNS_14BSONObjBuilderEbi+0x500) [0x1001f1660] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo11newRunQueryERNS_7MessageERNS_12QueryMessageERNS_5CurOpES1_+0x2e0) [0x100435820] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo16assembleResponseERNS_7MessageERNS_10DbResponseERKNS_11HostAndPortE+0x5a0) [0x1002d0280] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo16MyMessageHandler7processERNS_7MessageEPNS_21AbstractMessagingPortEPNS_9LastErrorE+0xb4) [0x10000e544] /Users/kk/code/mongo/mongo/./mongod(_ZN5mongo17PortMessageServer17handleIncomingMsgEPv+0x390) [0x100753af0]
Version: ce04ab3728edeff71f0c32590558cb980a07fdb3