加锁 同时队列可以无(wú )限(xiàn )长吗(ma ) 什(shí )么时候(hòu )消减,同(tóng )时采用(yòng )了弱引用避免队(duì )列(liè )过大,造(zào )成(chéng )gc压力 源码(mǎ )如(rú )下get recycle scavenge每次都(dōu )是从(cóng )head节点(diǎn )获取,如(rú )果获取不到(dào )就next,这些队列并不(bú )删除,jvm会(huì )自(zì )动在内存(cún )不(bú )够的时候删除
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