加锁 同(tóng )时队列可(kě )以无限长吗 什么(me )时(shí )候消(xiāo )减,同(tóng )时(shí )采(cǎi )用了弱引用避(bì )免(miǎn )队列过(guò )大,造成(chéng )gc压力 源(yuán )码如下(xià )get recycle scavenge每次(cì )都是从head节(jiē )点获取,如(rú )果获取不(bú )到就next,这些队列(liè )并(bìng )不删除(chú ),jvm会自动(dòng )在内存不够(gòu )的时候删除
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