加锁 同时(shí )队列可以(yǐ )无限长吗 什么时(shí )候消(xiāo )减(jiǎn ),同时(shí )采用了(le )弱(ruò )引用避免(miǎn )队(duì )列(liè )过大,造成(chéng )gc压(yā )力 源码如下(xià )get recycle scavenge每次都(dōu )是从head节点获(huò )取(qǔ ),如果获(huò )取(qǔ )不到(dào )就next,这些队列并不删(shān )除,jvm会自动(dòng )在(zài )内存不够的时候删除
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