Fixed a bug that ConnectionPool holds the same Redis client. #79
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When `pool_size` or `pool_timeout` is passed as an option, `Redis::Rack::Connection` builds a `ConnectionPool`. `ConnectionPool` will execute a given block when there are not enough connections. However, since the calling store is cached in an instance variable, all connections held by the `ConnectionPool` are actually same objects.
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When
pool_sizeorpool_timeoutis passed as an option,Redis::Rack::Connectionbuilds aConnectionPool.ConnectionPoolwill execute a given block when there are not enough connections. However, since the calling store is cached in an instance variable, all connections held by theConnectionPoolare actually same objects.It seems like something fatal would occur, but since there are no reports in the issues, maybe the existing implementation is no problem.
NOTE: This bug does not affect the following users:
threadsafe: true.threadsafeoption.{ pool: ConnectionPool.new(...) }.