Another approach is to generate a "random" bucket name at the start of your test and use that throughout the test , you can still delete the contents at the end of the test but the race condition isn't a problem for the next run (unless your random bucket name isn't very random). I use an UUID in the Java client integration tests. On 14 Mar 2011, at 12:45, Sean Cribbs wrote:
> We are aware of some race-conditions caused by repeatedly accessing a key > around DELETE requests. Here's one bug: > > https://issues.basho.com/show_bug.cgi?id=555 > > If you need to clear the data after a test run, I would suggest using the > 'riak_kv_test_backend' from the Ripple project, or simply shut down Riak and > delete the contents of the bitcask directory. > > Sean Cribbs <[email protected]> > Developer Advocate > Basho Technologies, Inc. > http://basho.com/ > > On Mar 14, 2011, at 8:27 AM, Runar Jordahl wrote: > >> I am running unit tests against my single-node Riak database installed >> on Ubuntu 10.10 64 bit. The tests write a few objects (key/value) to >> the database, and then end by deleting all keys in the test bucket. >> The test bucket is named “epigenttest”, the key I use is “test”. >> >> Today the database entered a state where my default bucket/key used >> for tests failed: If I tried doing a PUT using the following URL, I >> got a timeout: >> http://riaktest:8098/riak/epigenttest/test >> >> However, if I modified the bucket or the key, the operation worked. >> >> I could always reproduce the problem using bucket/key >> epigenttest/test. I suspect that the database had corrupt data, which >> prevented me from putting epigenttest/test. >> >> Before running the unit test, Riak reported that the database was empty: >> http://riaktest:8098/riak?buckets=true >> {"buckets":[]} >> >> I managed to get out of the problem by running “riak reboot”. I cannot >> reproduce the problem again. >> >> Could there be a bug in Riak when adding/deleting/putting the same >> key? Below I include the result of running Riak Stats. >> >> >> Kind regards >> Runar Jordahl >> >> >> >> http://riaktest:8098/stats >> { >> "vnode_gets": 3, >> "vnode_puts": 0, >> "read_repairs": 0, >> "vnode_gets_total": 1277, >> "vnode_puts_total": 511, >> "node_gets": 1, >> "node_gets_total": 427, >> "node_get_fsm_time_mean": 25691.0, >> "node_get_fsm_time_median": 25691, >> "node_get_fsm_time_95": 25691, >> "node_get_fsm_time_99": 25691, >> "node_get_fsm_time_100": 25691, >> "node_puts": 1, >> "node_puts_total": 201, >> "node_put_fsm_time_mean": 60000872.0, >> "node_put_fsm_time_median": 60000872, >> "node_put_fsm_time_95": 60000872, >> "node_put_fsm_time_99": 60000872, >> "node_put_fsm_time_100": 60000872, >> "read_repairs_total": 5, >> "cpu_nprocs": 292, >> "cpu_avg1": 56, >> "cpu_avg5": 61, >> "cpu_avg15": 64, >> "mem_total": 1050324992, >> "mem_allocated": 521408512, >> "nodename": "[email protected]", >> "connected_nodes": [ >> >> ], >> "sys_driver_version": "1.5", >> "sys_global_heaps_size": 0, >> "sys_heap_type": "private", >> "sys_logical_processors": 1, >> "sys_otp_release": "R13B04", >> "sys_process_count": 212, >> "sys_smp_support": false, >> "sys_system_version": "Erlang R13B04 (erts-5.7.5) [source] [rq:1] >> [async-threads:64] [kernel-poll:true]", >> "sys_system_architecture": "i486-pc-linux-gnu", >> "sys_threads_enabled": true, >> "sys_thread_pool_size": 64, >> "sys_wordsize": 4, >> "ring_members": [ >> "[email protected]" >> ], >> "ring_num_partitions": 64, >> "ring_ownership": "[{'[email protected]',64}]", >> "ring_creation_size": 64, >> "storage_backend": "riak_kv_bitcask_backend", >> "pbc_connects_total": 0, >> "pbc_connects": 0, >> "pbc_active": 0, >> "cluster_info_version": "1.0.0", >> "luwak_version": "1.0.0", >> "skerl_version": "1.0.0", >> "riak_kv_version": "0.14.0", >> "riak_core_version": "0.14.0", >> "bitcask_version": "1.1.5", >> "luke_version": "0.2.3", >> "webmachine_version": "1.8.0", >> "mochiweb_version": "1.7.1", >> "erlang_js_version": "0.5.0", >> "runtime_tools_version": "1.8.3", >> "crypto_version": "1.6.4", >> "os_mon_version": "2.2.5", >> "riak_err_version": "1.0.0", >> "sasl_version": "2.1.9", >> "stdlib_version": "1.16.5", >> "kernel_version": "2.13.5", >> "executing_mappers": 0 >> } >> >> _______________________________________________ >> riak-users mailing list >> [email protected] >> http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com > > > _______________________________________________ > riak-users mailing list > [email protected] > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
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