加(jiā )锁 同时队(duì )列可以无(wú )限长吗(ma ) 什(shí )么时候消减,同(tóng )时采(cǎi )用了弱引用避(bì )免队列过(guò )大,造成gc压力 源码(mǎ )如(rú )下get recycle scavenge每次都是(shì )从head节(jiē )点(diǎn )获取,如果获取(qǔ )不到就next,这(zhè )些队(duì )列并不删除,jvm会自动(dòng )在内存(cún )不够(gòu )的(de )时候(hòu )删(shān )除
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