加锁 同时(shí )队(duì )列可以无限长吗 什么时(shí )候消(xiāo )减,同时采用(yòng )了弱(ruò )引用避免队列(liè )过(guò )大(dà ),造成(chéng )gc压力 源码(mǎ )如(rú )下(xià )get recycle scavenge每次(cì )都(dōu )是从head节点获取,如(rú )果获取不到就next,这(zhè )些(xiē )队列并不(bú )删(shān )除,jvm会自(zì )动在内存(cún )不够的时候(hòu )删(shān )除
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