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加锁 同(tóng )时(shí )队(duì )列可(kě )以(yǐ )无限长吗(ma ) 什(shí )么(me )时(shí )候消减,同(tóng )时采(cǎi )用了弱引用避免队列(liè )过(guò )大(dà ),造成gc压力 源码(mǎ )如(rú )下(xià )get recycle scavenge每次都是从head节(jiē )点获取,如果获取不到就next,这(zhè )些队(duì )列并不(bú )删除,jvm会(huì )自动(dòng )在(zài )内存不够的时(shí )候删除

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