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What a thread dump reveals

Under load, a Java service stops responding but CPU is low. A thread dump shows 180 of 200 threads in BLOCKED state on the same monitor. What does that suggest?

A.The CPU is simply too fast for this kind of workloadB.Lock contention: many threads wait for one synchronized sectionC.The service is writing too few log files under loadD.The network card has run out of bandwidth

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What a thread dump reveals

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