加锁 同时(shí )队列(liè )可(kě )以无限长(zhǎng )吗 什(shí )么(me )时(shí )候消减,同(tóng )时采(cǎi )用(yòng )了弱引用避免(miǎn )队列过大(dà ),造成(chéng )gc压力 源码如(rú )下get recycle scavenge每次都(dōu )是从head节点获取,如果获(huò )取不(bú )到(dào )就next,这些队列并不删除,jvm会自动(dòng )在内存(cún )不(bú )够(gòu )的时候(hòu )删除
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