加锁 同时队列可(kě )以无(wú )限(xiàn )长吗 什么时(shí )候消(xiāo )减,同时采(cǎi )用了(le )弱(ruò )引用避(bì )免队(duì )列过(guò )大,造(zào )成gc压(yā )力(lì ) 源码如(rú )下get recycle scavenge每次都(dōu )是从head节点(diǎn )获取(qǔ ),如(rú )果获取不到(dào )就next,这些队列并不(bú )删除,jvm会自动在内存不(bú )够的(de )时候删除
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