加锁 同(tóng )时队列(liè )可以无限长(zhǎng )吗 什么时候消减,同(tóng )时(shí )采(cǎi )用(yòng )了(le )弱引用避免队列过大(dà ),造(zào )成(chéng )gc压力 源码如(rú )下get recycle scavenge每次都(dōu )是(shì )从head节(jiē )点(diǎn )获取,如(rú )果(guǒ )获取不到就next,这(zhè )些(xiē )队列并(bìng )不(bú )删除,jvm会(huì )自动在内(nèi )存不够的时候删除
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