Hi,
When I put a Seaside app under (moderate) load, I start seeing (a lot of) these messages on the object log: Commit failure - retrying 4056 10/21/2011 17:15:19:721 /examples/counter?_s=DOlpgBbSgehpWYrn&_k=Kb2SqTqskaYDAVQ-&1 aSymbolDictionary The object in the log entry is the following: aSymbolDictionary( #'commitResult'->#'success', #'Write-Write'->anArray( anIdentityDictionary( #'cacheCapacity'->aWAAttributeSearchContext))) Am I understanding correctly that this means that there is a write-write conflict in an identitydictionary on the key-value pair that is mentioned? This appears to be a conflict in the instance variable of WAConfiguration instances. From here on, I am a bit lost how the write-write conflict could appear. The log above comes from a load test on the counter example where I modified the ++ link action to include a delay of 2s using "(Delay forSeconds: 2) wait". The idea is to simulate longer request running times. If I leave out the delay, I am not seeing them (even under high load), but the problem is (of course) that I am seeing these in our real application that has longer request running times... My load tests are done using a jmeter test, which I attach. Counter.jmx (10K) Download Attachment |
Johan,
Good catch. See Issue 303 for my take on the problem... Dale ----- Original Message ----- | From: "Johan Brichau" <[hidden email]> | To: "GemStone Seaside beta discussion" <[hidden email]> | Sent: Friday, October 21, 2011 11:20:13 AM | Subject: [GS/SS Beta] write-write conflicts on cached search contexts in WAConfiguration | | Hi, | | When I put a Seaside app under (moderate) load, I start seeing (a lot | of) these messages on the object log: | | Commit failure - retrying 4056 10/21/2011 17:15:19:721 | /examples/counter?_s=DOlpgBbSgehpWYrn&_k=Kb2SqTqskaYDAVQ-&1 | aSymbolDictionary | | The object in the log entry is the following: aSymbolDictionary( | #'commitResult'->#'success', #'Write-Write'->anArray( | anIdentityDictionary( #'cacheCapacity'->aWAAttributeSearchContext))) | | Am I understanding correctly that this means that there is a | write-write conflict in an identitydictionary on the key-value pair | that is mentioned? | This appears to be a conflict in the instance variable of | WAConfiguration instances. | | From here on, I am a bit lost how the write-write conflict could | appear. | | The log above comes from a load test on the counter example where I | modified the ++ link action to include a delay of 2s using "(Delay | forSeconds: 2) wait". The idea is to simulate longer request running | times. If I leave out the delay, I am not seeing them (even under | high load), but the problem is (of course) that I am seeing these in | our real application that has longer request running times... | | My load tests are done using a jmeter test, which I attach. | | | | |
Hi Dale,
That is what I tried: replacing the identitydict with a RcKeyValueDict However, that just meant I was getting RcWrite-write conflicts :-( Johan On 21 Oct 2011, at 20:56, Dale Henrichs wrote: > Johan, > > Good catch. See Issue 303 for my take on the problem... > > Dale > > ----- Original Message ----- > | From: "Johan Brichau" <[hidden email]> > | To: "GemStone Seaside beta discussion" <[hidden email]> > | Sent: Friday, October 21, 2011 11:20:13 AM > | Subject: [GS/SS Beta] write-write conflicts on cached search contexts in WAConfiguration > | > | Hi, > | > | When I put a Seaside app under (moderate) load, I start seeing (a lot > | of) these messages on the object log: > | > | Commit failure - retrying 4056 10/21/2011 17:15:19:721 > | /examples/counter?_s=DOlpgBbSgehpWYrn&_k=Kb2SqTqskaYDAVQ-&1 > | aSymbolDictionary > | > | The object in the log entry is the following: aSymbolDictionary( > | #'commitResult'->#'success', #'Write-Write'->anArray( > | anIdentityDictionary( #'cacheCapacity'->aWAAttributeSearchContext))) > | > | Am I understanding correctly that this means that there is a > | write-write conflict in an identitydictionary on the key-value pair > | that is mentioned? > | This appears to be a conflict in the instance variable of > | WAConfiguration instances. > | > | From here on, I am a bit lost how the write-write conflict could > | appear. > | > | The log above comes from a load test on the counter example where I > | modified the ++ link action to include a delay of 2s using "(Delay > | forSeconds: 2) wait". The idea is to simulate longer request running > | times. If I leave out the delay, I am not seeing them (even under > | high load), but the problem is (of course) that I am seeing these in > | our real application that has longer request running times... > | > | My load tests are done using a jmeter test, which I attach. > | > | > | > | |
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