加(jiā )锁 同时队列可以无(wú )限长吗 什(shí )么(me )时候消减,同(tóng )时采(cǎi )用(yòng )了(le )弱引用(yòng )避免队列(liè )过大,造成(chéng )gc压力(lì ) 源码如下get recycle scavenge每次都(dōu )是(shì )从(cóng )head节点(diǎn )获取(qǔ ),如(rú )果获取不到就next,这些队列并不(bú )删除,jvm会自动(dòng )在内存不够(gòu )的时候删(shān )除
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