Carl Mastrangelo d2cb51bc2e Enable PooledByteBufAllocator to work, event without a cache ... Motivation: `useCacheForAllThreads` may be false which disables memory caching on non netty threads. Setting this argument or the system property makes it impossible to use `PooledByteBufAllocator`. Modifications: Delayed the check of `freeSweepAllocationThreshold` in `PoolThreadCache` to after it knows there will be any caches in use. Additionally, check if the caches will have any data in them (rather than allocating a 0-length array). A test case is also added that fails without this change. Results: Fixes #7194		2017-09-08 10:20:45 +02:00
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netty/buffer	Enable PooledByteBufAllocator to work, event without a cache	2017-09-08 10:20:45 +02:00