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log for each get/try/release lock
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parent
4622362e42
commit
387ecac6cb
1 changed files with 9 additions and 4 deletions
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@ -30,14 +30,16 @@ module.exports = LockManager =
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tryLock : (doc_id, callback = (err, isFree)->)->
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lockValue = LockManager.randomLock()
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key = keys.blockingKey(doc_id:doc_id)
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logger.log {doc_id: doc_id, key: key}, "tryLock"
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rclient.set key, lockValue, "EX", @LOCK_TTL, "NX", (err, gotLock)->
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return callback(err) if err?
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if gotLock == "OK"
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metrics.inc "doc-not-blocking"
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logger.log {doc_id: doc_id, key: key, lockValue: lockValue}, "got lock"
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callback err, true, lockValue
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else
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metrics.inc "doc-blocking"
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logger.log {doc_id}, "doc is locked"
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logger.log {doc_id: doc_id, key: key}, "doc is locked"
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callback err, false
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getLock: (doc_id, callback = (error, lockValue) ->) ->
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@ -54,6 +56,7 @@ module.exports = LockManager =
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if gotLock
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callback(null, lockValue)
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else
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logger.log {doc_id: doc_id, delay: testInterval}, "will retry lock"
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setTimeout attempt, testInterval
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# back off when the lock is taken to avoid overloading
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testInterval = Math.min(testInterval * 2, LockManager.MAX_TEST_INTERVAL)
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@ -75,7 +78,9 @@ module.exports = LockManager =
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rclient.eval LockManager.unlockScript, 1, key, lockValue, (err, result) ->
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if err?
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return callback(err)
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if result? and result isnt 1 # successful unlock should release exactly one key
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logger.error {doc_id:doc_id, lockValue:lockValue, redis_err:err, redis_result:result}, "unlocking error"
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else if result? and result isnt 1 # successful unlock should release exactly one key
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logger.error {doc_id:doc_id, key:key, lockValue:lockValue, redis_err:err, redis_result:result}, "unlocking error"
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return callback(new Error("tried to release timed out lock"))
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callback(err,result)
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else
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logger.log {doc_id:doc_id, key:key, lockValue:lockValue}, "released lock"
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callback(err,result)
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