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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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None
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ALL
Hi,
I believe I'm facing a bug. The procedure to trigger the issue is:
- MongoDB 3.6(the minor version does not matter since I can reproduce in the latest 3.6.23 as well)
- Set FCV to 3.4
- Restart mongoS
My python dummy script:
import pymongo myclient = pymongo.MongoClient("mongodb://user:password@localhost:37017,localhost:37018/test?authSource=admin&connectTimeoutMS=9000&readConcernLevel=majority&readPreference=secondaryPreferred&retryReads=true&minPoolSize=100&maxPoolSize=100&socketKeepAlive=true") mydb = myclient["dbtest"] mycol = mydb["colltest"] #print(myclient); doc={ 'a': 1,'b': 2} #print(myclient.admin.command('currentOp')) print(myclient.admin.command('ismaster')) mycol.insert(doc); { return foo; }
Following the steps above, the following error is thrown:
$ python3 script.py Traceback (most recent call last): File "script.py", line 11, in <module> print(myclient.admin.command('ismaster')) File "/usr/local/lib64/python3.6/site-packages/pymongo/database.py", line 733, in command codec_options, session=session, **kwargs) File "/usr/local/lib64/python3.6/site-packages/pymongo/database.py", line 630, in _command client=self.__client) File "/usr/local/lib64/python3.6/site-packages/pymongo/pool.py", line 613, in command user_fields=user_fields) File "/usr/local/lib64/python3.6/site-packages/pymongo/network.py", line 167, in command parse_write_concern_error=parse_write_concern_error) File "/usr/local/lib64/python3.6/site-packages/pymongo/helpers.py", line 159, in _check_command_response raise OperationFailure(msg % errmsg, code, response) pymongo.errors.OperationFailure: Cache Reader No keys found for HMAC that is valid for time: { ts: Timestamp(1630774279, 1) } with id: 7004119824641032208
I noticed that only if I restart the entire cluster the problem goes away. Since the behavior is erratic, I believe this is a bug.