加锁 同时(shí )队(duì )列可以无(wú )限长吗 什(shí )么时候(hòu )消减,同时采(cǎi )用了弱引(yǐn )用(yòng )避免(miǎn )队列过(guò )大,造成gc压(yā )力 源码(mǎ )如下(xià )get recycle scavenge每次都(dōu )是从head节点(diǎn )获取(qǔ ),如果获(huò )取不到就next,这(zhè )些队列并不(bú )删(shān )除(chú ),jvm会自动(dòng )在内存不够的时(shí )候删(shān )除
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