Use of the low-level REST client on JDK 7 is deprecated and will be removed in version 7.0.0 of the client – How to solve related issues

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Use of the low-level REST client on JDK 7 is deprecated and will be removed in version 7.0.0 of the client – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Use of the low-level REST client on JDK 7 is deprecated and will be removed in version 7.0.0 of the client ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: client, rest and version.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Use of the low-level REST client on JDK 7 is deprecated and will be removed in version 7.0.0 of the client” classname is RestClient.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

         this.pathPrefix = pathPrefix;
        this.nodeSelector = nodeSelector;
        this.warningsHandler = strictDeprecationMode ? WarningsHandler.STRICT : WarningsHandler.PERMISSIVE;
        setNodes(nodes);
        if (JavaVersion.current().compareTo(JavaVersion.parse("1.8.0")) 

 

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