加锁 同(tóng )时队列可以(yǐ )无(wú )限长(zhǎng )吗 什(shí )么(me )时候消减(jiǎn ),同时采(cǎi )用了(le )弱引(yǐn )用避免队列(liè )过(guò )大,造成gc压力 源码如(rú )下(xià )get recycle scavenge每(měi )次都是从(cóng )head节点获取,如果(guǒ )获取不到就next,这些(xiē )队(duì )列并(bìng )不(bú )删除,jvm会自动(dòng )在内存不(bú )够的时候(hòu )删(shān )除(chú )
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