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加(jiā )锁(suǒ ) 同(tóng )时队(duì )列可以无限长吗 什(shí )么时候(hòu )消减,同时(shí )采用了弱引用(yòng )避(bì )免队列过(guò )大(dà ),造(zào )成(chéng )gc压力(lì ) 源(yuán )码如(rú )下(xià )get recycle scavenge每次都是从head节点(diǎn )获取(qǔ ),如(rú )果(guǒ )获(huò )取不到就next,这些(xiē )队列并不删除,jvm会自(zì )动(dòng )在内存不(bú )够的时(shí )候删除

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