加锁 同(tóng )时队(duì )列(liè )可(kě )以无限(xiàn )长吗 什(shí )么时候消减,同时(shí )采用了弱引用(yòng )避免(miǎn )队列过大,造成(chéng )gc压(yā )力 源码如(rú )下get recycle scavenge每次都是从(cóng )head节点获(huò )取,如果获取(qǔ )不到(dào )就(jiù )next,这些队列并不删(shān )除(chú ),jvm会(huì )自动在内存(cún )不够(gòu )的(de )时候删除(chú )
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