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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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Affects Version/s: None
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Component/s: Testing Infrastructure
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None
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Fully Compatible
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ALL
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Storage NYC 2018-04-23
I am running the following in the mongo shell against current master. This opens a multi-statement transaction and then runs a collection drop outside of the transaction which blocks on the stashed transaction resources.
db.test.drop(); assert.writeOK(db.test.insert({}, {writeConcern: {w: "majority"}})); const session = db.getMongo().startSession({}) session.startTransaction({readConcern: {level: "snapshot"}}) const sessionDB = session.getDatabase("test"); assert.commandWorked(sessionDB.runCommand({find: "test"})); db.test.drop();
See the attached screenshot for the result. The graphviz output which generates this is:
digraph "mongod+lock-status" {
"Thread 0x7fd29e216700" -> "Lock 0x559449183b00";
"Lock 0x559449183b00" -> "Thread 0x7fd29e216700";
"Thread 0x7fd29233f700" -> "Lock 0x559449183b00";
"Thread 0x7fd29e216700" [label=""conn2" (Thread 0x7fd29e216700 (LWP 16109))" ]
"Lock 0x559449183b00" [label="Lock 0x559449183b00 (MongoDB lock)" ]
"Thread 0x7fd29233f700" [label=""clientcursormon" (Thread 0x7fd29233f700 (LWP 16068))" ]
}
- is caused by
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SERVER-33987 add thread name to hang analyzer output
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- Closed
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- related to
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- Closed
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