加(jiā )锁 同时(shí )队列可(kě )以无限(xiàn )长吗 什么时候(hòu )消减(jiǎn ),同时采用了弱(ruò )引用(yòng )避(bì )免队列过(guò )大,造成gc压力 源(yuán )码如(rú )下get recycle scavenge每(měi )次都是(shì )从head节(jiē )点获取,如果获取不到就next,这些(xiē )队列(liè )并(bìng )不删除,jvm会(huì )自动(dòng )在(zài )内存不够的时(shí )候删(shān )除
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