加锁 同时(shí )队列可以无(wú )限(xiàn )长(zhǎng )吗 什么时候消减,同(tóng )时采用(yòng )了弱引用(yòng )避(bì )免队列过大(dà ),造成gc压力 源码如(rú )下get recycle scavenge每(měi )次都(dōu )是从(cóng )head节点(diǎn )获取,如(rú )果获(huò )取(qǔ )不(bú )到就next,这(zhè )些队列(liè )并不(bú )删除(chú ),jvm会自(zì )动在内存不够的时候(hòu )删(shān )除
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