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加锁 同时队列可(kě )以无(wú )限长吗 什(shí )么(me )时候消减,同(tóng )时(shí )采用了(le )弱引(yǐn )用避(bì )免(miǎn )队列过大(dà ),造成gc压力(lì ) 源(yuán )码如下get recycle scavenge每次(cì )都是从head节(jiē )点(diǎn )获取,如(rú )果获(huò )取(qǔ )不到(dào )就next,这(zhè )些队列并不删除(chú ),jvm会(huì )自动在内存不(bú )够的时(shí )候删除

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