加锁 同时(shí )队列(liè )可以(yǐ )无(wú )限长(zhǎng )吗 什么(me )时候(hòu )消减,同(tóng )时采用(yòng )了弱引用避(bì )免队列过大,造成(chéng )gc压力 源码如下get recycle scavenge每次都是从head节点获(huò )取,如(rú )果获取(qǔ )不到(dào )就next,这(zhè )些(xiē )队列并(bìng )不(bú )删(shān )除(chú ),jvm会自动在内存(cún )不够的时(shí )候删除
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