Details
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Bug
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Status: Closed
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Major - P3
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Resolution: Fixed
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2.6.9
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None
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OS: Windows Server 2008 R2 Standard SP1 64bit
CPU: Intel(R) Core(TM)2 Quad CPU Q9550 @2.83GHz
RAM: 6.00GB
MongoDB Version: 2.6.5 and 2.6.7
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Fully Compatible
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Windows
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Description
I got this assertion error when execute remove operation.
You can get the error by running the attached tool.
Could you investigate this error using the tool?
After doing procedure(refer to "Steps To Reproduce"), you can find the error log like below.
testTenant2.testBucket0 Assertion failure false src\mongo\db\structure\btree\key.cpp 433
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\util\stacktrace.cpp(169) mongo::printStackTrace+0x43
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\util\log.cpp(127) mongo::logContext+0x9c
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\util\assert_util.cpp(115) mongo::verifyFailed+0x14a
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\structure\btree\key.cpp(433) mongo::KeyV1::toBson+0x34e
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\index\btree_interface.cpp(168) mongo::BtreeInterfaceImpl<mongo::BtreeData_V1>::keyAt+0x16b
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\index\btree_index_cursor.cpp(175) mongo::BtreeIndexCursor::getKey+0x5d
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\exec\index_scan.cpp(314) mongo::IndexScan::checkEnd+0x1a1
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\exec\index_scan.cpp(150) mongo::IndexScan::work+0x6f
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\exec\fetch.cpp(82) mongo::FetchStage::work+0x99
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\exec\keep_mutations.cpp(60) mongo::KeepMutationsStage::work+0x55
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\query\plan_executor.cpp(91) mongo::PlanExecutor::getNext+0x16b
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\ops\delete_executor.cpp(154) mongo::DeleteExecutor::execute+0x866
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\commands\write_commands\batch_executor.cpp(1201) mongo::multiRemove+0x589
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\commands\write_commands\batch_executor.cpp(887) mongo::WriteBatchExecutor::execRemove+0xad
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\commands\write_commands\batch_executor.cpp(743) mongo::WriteBatchExecutor::bulkExecute+0x29b
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\commands\write_commands\batch_executor.cpp(249) mongo::WriteBatchExecutor::executeBatch+0xb6c
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\commands\write_commands\write_commands.cpp(146) mongo::WriteCmd::run+0x1e6
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\dbcommands.cpp(1385) mongo::_execCommand+0x5e
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\dbcommands.cpp(1592) mongo::Command::execCommand+0xf09
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2015-01-22T15:38:00.045+0900 [conn65] mongod.exe ...\src\mongo\db\dbcommands.cpp(1724) mongo::_runCommands+0x4a7
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2015-01-22T15:38:00.045+0900 [conn65] testTenant2.testBucket0
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2015-01-22T15:38:00.045+0900 [conn65] remove testTenant2.testBucket0 query: { _id: ObjectId('54c09ac7a68d879e3aaf086a'), var1: "str1" } ndeleted:0 keyUpdates:0 exception: assertion src\mongo\db\structure\btree\key.cpp:433 code:8 numYields:0 locks(micros) w:694341 694ms
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Frequency of occurrence is:
- 4 in 4 times (tool execute times)
I attached the tool written above:
- test.bat
... Execute "OperationCycle.js" many times at the same time. - OperationCycle.js
... Repeat executing Mongo operations(insert, findOne, update, remove). - Setting.js
... Set parameters.
You don't need to modify these files.
This tool means:
Several users execute Mongo Operations(insert, find, update, remove) to several colletions in several databases at the same time.
I think the important point to occur this error is to execute index scan stage in remove operation by setting "two" items in remove operation's query.
For example:
db.coll.remove({ "_id" : testId , "key": "val"}
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(setting two items : "_id" and "key")