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加(jiā )锁 同(tóng )时队列可以无(wú )限长(zhǎng )吗(ma ) 什(shí )么时候(hòu )消(xiāo )减,同时采用(yòng )了弱引用避(bì )免队列(liè )过(guò )大(dà ),造成(chéng )gc压力(lì ) 源码如下get recycle scavenge每次(cì )都是(shì )从(cóng )head节点(diǎn )获取,如(rú )果获取不到就(jiù )next,这些(xiē )队列(liè )并(bìng )不删除,jvm会自动在(zài )内存不够(gòu )的时(shí )候删除

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