Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about how to analyze the ToBeAppliedRequestProcessor in zk. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

ToBeAppliedRequestProcessor in Leader

Between the processed transaction and the last processed transaction processor, the next on the processor chain is FinalRequestProcessor

Public void processRequest (Request request) throws RequestProcessorException {next.processRequest (request); / / The only requests that should be on toBeApplied are write / / requests, for which we will have a hdr. We can't simply use / / request.zxid here because that is set on read requests to equal / / the zxid of the last write op. If (request.getHdr ()! = null) {long zxid = request.getHdr (). GetZxid (); Iterator iter = leader.toBeApplied.iterator (); if (iter.hasNext ()) {Proposal p = iter.next (); if (p.request! = null & & p.request.zxid = = zxid) {iter.remove (); return }} LOG.error ("Committed request not found on toBeApplied:" + request);}} the above is shared by the editor on how to parse the ToBeAppliedRequestProcessor in zk. If you happen to have similar doubts, please refer to the above analysis. If you want to know more about it, you are welcome to follow the industry information channel.

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