我有一个将MongoDB用作数据库的ruby应用程序。在为此应用程序运行测试时，我正在使用Minitest为每个测试用例创建集合和索引。
使用docker compose创建测试环境，其中一个容器正在运行测试，另一个容器正在运行MongoDB。
第一次运行测试时，过一会儿MongoDB卡住了。任何查询集合的请求都不会响应。
在使用命令行客户端开始运行测试之前，我已经能够连接到它。当我使用db.serverStatus()检查服务器的状态时，我看到某些操作已获得锁。通过查看globalLock字段，我了解到1个操作具有write锁，并且有2个操作正在等待获取read锁。
我无法理解为什么这些操作会挂起而不产生锁。我不知道如何进一步调试此问题。
MongoDB版本：3.6.13 Ruby驱动程序版本：2.8.0
我还尝试了其他版本3.6.x和4.0
我们非常感谢您的帮助或指导。
db.serverStatus输出
{
"host" : "c658c885eb90",
"version" : "3.6.14",
"process" : "mongod",
"pid" : NumberLong(1),
"uptime" : 98,
"uptimeMillis" : NumberLong(97909),
"uptimeEstimate" : NumberLong(97),
"localTime" : ISODate("2019-11-03T16:09:14.289Z"),
"asserts" : {
"regular" : 0,
"warning" : 0,
"msg" : 0,
"user" : 0,
"rollovers" : 0
},
"connections" : {
"current" : 6,
"available" : 838854,
"totalCreated" : 11
},
"extra_info" : {
"note" : "fields vary by platform",
"page_faults" : 0
},
"globalLock" : {
"totalTime" : NumberLong(97908000),
"currentQueue" : {
"total" : 2,
"readers" : 2,
"writers" : 0
},
"activeClients" : {
"total" : 13,
"readers" : 0,
"writers" : 1
}
},
"locks" : {
"Global" : {
"acquireCount" : {
"r" : NumberLong(14528),
"w" : NumberLong(12477),
"W" : NumberLong(5)
}
},
"Database" : {
"acquireCount" : {
"r" : NumberLong(1020),
"w" : NumberLong(14459),
"R" : NumberLong(3),
"W" : NumberLong(6599)
},
"acquireWaitCount" : {
"r" : NumberLong(2)
},
"timeAcquiringMicros" : {
"r" : NumberLong(76077321)
}
},
"Collection" : {
"acquireCount" : {
"R" : NumberLong(1018),
"W" : NumberLong(8805)
}
},
"Metadata" : {
"acquireCount" : {
"W" : NumberLong(37)
}
}
},
"logicalSessionRecordCache" : {
"activeSessionsCount" : 3,
"sessionsCollectionJobCount" : 1,
"lastSessionsCollectionJobDurationMillis" : 0,
"lastSessionsCollectionJobTimestamp" : ISODate("2019-11-03T16:07:36.407Z"),
"lastSessionsCollectionJobEntriesRefreshed" : 0,
"lastSessionsCollectionJobEntriesEnded" : 0,
"lastSessionsCollectionJobCursorsClosed" : 0,
"transactionReaperJobCount" : 0,
"lastTransactionReaperJobDurationMillis" : 0,
"lastTransactionReaperJobTimestamp" : ISODate("2019-11-03T16:07:36.407Z"),
"lastTransactionReaperJobEntriesCleanedUp" : 0
},
"network" : {
"bytesIn" : NumberLong(1682811),
"bytesOut" : NumberLong(1019834),
"physicalBytesIn" : NumberLong(1682811),
"physicalBytesOut" : NumberLong(1019834),
"numRequests" : NumberLong(7822),
"compression" : {
"snappy" : {
"compressor" : {
"bytesIn" : NumberLong(0),
"bytesOut" : NumberLong(0)
},
"decompressor" : {
"bytesIn" : NumberLong(0),
"bytesOut" : NumberLong(0)
}
}
},
"serviceExecutorTaskStats" : {
"executor" : "passthrough",
"threadsRunning" : 6
}
},
"opLatencies" : {
"reads" : {
"latency" : NumberLong(61374),
"ops" : NumberLong(963)
},
"writes" : {
"latency" : NumberLong(13074),
"ops" : NumberLong(286)
},
"commands" : {
"latency" : NumberLong(988232),
"ops" : NumberLong(6570)
}
},
"opReadConcernCounters" : {
"available" : NumberLong(0),
"linearizable" : NumberLong(0),
"local" : NumberLong(0),
"majority" : NumberLong(0),
"none" : NumberLong(944)
},
"opcounters" : {
"insert" : 246,
"query" : 944,
"update" : 40,
"delete" : 0,
"getmore" : 0,
"command" : 6595
},
"opcountersRepl" : {
"insert" : 0,
"query" : 0,
"update" : 0,
"delete" : 0,
"getmore" : 0,
"command" : 0
},
"storageEngine" : {
"name" : "ephemeralForTest",
"supportsCommittedReads" : false,
"readOnly" : false,
"persistent" : false
},
"tcmalloc" : {
"generic" : {
"current_allocated_bytes" : 8203504,
"heap_size" : 12496896
},
"tcmalloc" : {
"pageheap_free_bytes" : 2760704,
"pageheap_unmapped_bytes" : 0,
"max_total_thread_cache_bytes" : 516947968,
"current_total_thread_cache_bytes" : 1007120,
"total_free_bytes" : 1532688,
"central_cache_free_bytes" : 231040,
"transfer_cache_free_bytes" : 294528,
"thread_cache_free_bytes" : 1007120,
"aggressive_memory_decommit" : 0,
"pageheap_committed_bytes" : 12496896,
"pageheap_scavenge_count" : 0,
"pageheap_commit_count" : 9,
"pageheap_total_commit_bytes" : 12496896,
"pageheap_decommit_count" : 0,
"pageheap_total_decommit_bytes" : 0,
"pageheap_reserve_count" : 9,
"pageheap_total_reserve_bytes" : 12496896,
"spinlock_total_delay_ns" : 0,
"formattedString" : "------------------------------------------------\nMALLOC: 8204080 ( 7.8 MiB) Bytes in use by application\nMALLOC: + 2760704 ( 2.6 MiB) Bytes in page heap freelist\nMALLOC: + 231040 ( 0.2 MiB) Bytes in central cache freelist\nMALLOC: + 294528 ( 0.3 MiB) Bytes in transfer cache freelist\nMALLOC: + 1006544 ( 1.0 MiB) Bytes in thread cache freelists\nMALLOC: + 1204480 ( 1.1 MiB) Bytes in malloc metadata\nMALLOC: ------------\nMALLOC: = 13701376 ( 13.1 MiB) Actual memory used (physical + swap)\nMALLOC: + 0 ( 0.0 MiB) Bytes released to OS (aka unmapped)\nMALLOC: ------------\nMALLOC: = 13701376 ( 13.1 MiB) Virtual address space used\nMALLOC:\nMALLOC: 415 Spans in use\nMALLOC: 18 Thread heaps in use\nMALLOC: 4096 Tcmalloc page size\n------------------------------------------------\nCall ReleaseFreeMemory() to release freelist memory to the OS (via madvise()).\nBytes released to the OS take up virtual address space but no physical memory.\n"
}
},
"transactions" : {
"retriedCommandsCount" : NumberLong(0),
"retriedStatementsCount" : NumberLong(0),
"transactionsCollectionWriteCount" : NumberLong(0)
},
"transportSecurity" : {
"1.0" : NumberLong(0),
"1.1" : NumberLong(0),
"1.2" : NumberLong(0),
"1.3" : NumberLong(0),
"unknown" : NumberLong(0)
},
"mem" : {
"bits" : 64,
"resident" : 41,
"virtual" : 836,
"supported" : true,
"mapped" : 0
},
"metrics" : {
"commands" : {
"buildInfo" : {
"failed" : NumberLong(0),
"total" : NumberLong(2)
},
"count" : {
"failed" : NumberLong(0),
"total" : NumberLong(21)
},
"createIndexes" : {
"failed" : NumberLong(0),
"total" : NumberLong(5656)
},
"drop" : {
"failed" : NumberLong(0),
"total" : NumberLong(784)
},
"dropIndexes" : {
"failed" : NumberLong(87),
"total" : NumberLong(87)
},
"find" : {
"failed" : NumberLong(0),
"total" : NumberLong(944)
},
"getLog" : {
"failed" : NumberLong(0),
"total" : NumberLong(1)
},
"insert" : {
"failed" : NumberLong(0),
"total" : NumberLong(246)
},
"isMaster" : {
"failed" : NumberLong(0),
"total" : NumberLong(38)
},
"listCollections" : {
"failed" : NumberLong(0),
"total" : NumberLong(1)
},
"listIndexes" : {
"failed" : NumberLong(1),
"total" : NumberLong(1)
},
"replSetGetStatus" : {
"failed" : NumberLong(1),
"total" : NumberLong(1)
},
"serverStatus" : {
"failed" : NumberLong(0),
"total" : NumberLong(2)
},
"update" : {
"failed" : NumberLong(0),
"total" : NumberLong(40)
},
"whatsmyuri" : {
"failed" : NumberLong(0),
"total" : NumberLong(1)
}
},
"cursor" : {
"timedOut" : NumberLong(0),
"open" : {
"noTimeout" : NumberLong(0),
"pinned" : NumberLong(0),
"total" : NumberLong(0)
}
},
"document" : {
"deleted" : NumberLong(0),
"inserted" : NumberLong(246),
"returned" : NumberLong(398),
"updated" : NumberLong(40)
},
"getLastError" : {
"wtime" : {
"num" : 0,
"totalMillis" : 0
},
"wtimeouts" : NumberLong(0)
},
"operation" : {
"scanAndOrder" : NumberLong(0),
"writeConflicts" : NumberLong(0)
},
"query" : {
"updateOneOpStyleBroadcastWithExactIDCount" : NumberLong(0),
"upsertReplacementCannotTargetByQueryCount" : NumberLong(0)
},
"queryExecutor" : {
"scanned" : NumberLong(435),
"scannedObjects" : NumberLong(438)
},
"record" : {
"moves" : NumberLong(0)
},
"repl" : {
"executor" : {
"pool" : {
"inProgressCount" : 0
},
"queues" : {
"networkInProgress" : 0,
"sleepers" : 0
},
"unsignaledEvents" : 0,
"shuttingDown" : false,
"networkInterface" : "\nNetworkInterfaceASIO Operations' Diagnostic:\nOperation: Count: \nConnecting 0 \nIn Progress 0 \nSucceeded 0 \nCanceled 0 \nFailed 0 \nTimed Out 0 \n\n"
},
"apply" : {
"attemptsToBecomeSecondary" : NumberLong(0),
"batchSize" : NumberLong(0),
"batches" : {
"num" : 0,
"totalMillis" : 0
},
"ops" : NumberLong(0)
},
"buffer" : {
"count" : NumberLong(0),
"maxSizeBytes" : NumberLong(0),
"sizeBytes" : NumberLong(0)
},
"initialSync" : {
"completed" : NumberLong(0),
"failedAttempts" : NumberLong(0),
"failures" : NumberLong(0)
},
"network" : {
"bytes" : NumberLong(0),
"getmores" : {
"num" : 0,
"totalMillis" : 0
},
"ops" : NumberLong(0),
"readersCreated" : NumberLong(0)
},
"preload" : {
"docs" : {
"num" : 0,
"totalMillis" : 0
},
"indexes" : {
"num" : 0,
"totalMillis" : 0
}
}
},
"storage" : {
"freelist" : {
"search" : {
"bucketExhausted" : NumberLong(0),
"requests" : NumberLong(0),
"scanned" : NumberLong(0)
}
}
},
"ttl" : {
"deletedDocuments" : NumberLong(0),
"passes" : NumberLong(1)
}
},
"ok" : 1
}
答案 0 :(得分：-1)
MongoDB卡住了
您需要缩小范围。您是否可以连接到部署中的任何节点？在每个节点上运行{ismaster: 1}？执行任何查询，特别是对其他数据库和集合的查询吗？
使用服务器日志来协助调试。如果服务器出现问题，通常会将问题记录在日志中。
还可以提高日志记录级别以进行调试，以从驱动程序获取其他诊断信息：https://docs.mongodb.com/mongoid/master/tutorials/mongoid-configuration/#logging