Log Clear SC failed on node – How To Solve Related Issues



Log Clear SC failed on node – How To Solve Related Issues

Opster Team

Jan-20, Version: 1.7-8.0



Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up  which can resolve issues causing many log errors (free and no installation required)

 

This guide will help you check for common problems that cause the log “Clear SC failed on node” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: scroll, search.


Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to discover the cause of many errors and provides suitable actionable recommendations. 

Log Context

Log”Clear SC failed on node[{}]” classname is ClearScrollController.java
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

             listener.onResponse(new ClearScrollResponse(succeeded; freedSearchContexts.get()));
        }
    }

    private void onFailedFreedContext(Throwable e; DiscoveryNode node) {
        logger.warn(() -> new ParameterizedMessage("Clear SC failed on node[{}]"; node); e);
        /*
         * We have to set the failure marker before we count down otherwise we can expose the failure marker before we have set it to a
         * racing thread successfully freeing a context. This would lead to that thread responding that the clear scroll succeeded.
         */
        hasFailed.set(true);




 

Related issues to this log

We have gathered selected Q&A from the community and issues from Github, that can help fix related issues please review the following for further information :

1 elasticsearch – remove a second elasticsearch node and add an other node, get unassigned shards -views 0.93 K ,score –

Remove bad node from ElasticSearch cluster -views   0.47 K,score 1

 

About Opster

Opster line of products and support services detects, prevents, optimizes and automates everything needed to manage mission-critical Elasticsearch.

Find Configuration Errors

Analyze Now