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