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.sample() methods of PerOperationSampler and GuaranteedThroughputSampler are synchronized #807
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I have the changes in an internal fork awaiting approval for contribution upstream. |
william-tran
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- Add volatile keyword to underlying samplers so updated references can be made available to other threads. See jaegertracing#609 for similar work. Fixes jaegertracing#807 Signed-off-by: Will Tran <will@autonomic.ai>
william-tran
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- Use a ConcurrentHashMap for operationNameToSampler so that any number of concurrent calls to sample can be made and safely modify it. - Add volatile to any fields that can be changed by the update method to ensure visibility of changes to other threads. - Retain instances of GuaranteedThroughputSampler to preserve their rate limit balances across updates when parameters don't change improving on jaegertracing/jaeger#1729 See jaegertracing#609 for similar work. Fixes jaegertracing#807 Signed-off-by: Will Tran <will@autonomic.ai>
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Along the lines of #608 and #609, with the move to Java 8 baseline in #802, we have further opportunities to improve sampler concurrency, and we should eliminate
synchronizedon all implementations ofSampler.sample(). Contention remains on all calls toRemoteControlledSampler.sample()due to the underlying synchronization ofPerOperationSampler.sample().The text was updated successfully, but these errors were encountered: