Gradle not finding java tools.jar

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Hi,
Build fails on CentOS7.
JDK8 is installed.
Could you tell me a good measures?

$ ./gradlew clean build -xtest

FAILURE: Build failed with an exception.

  • What went wrong:
    Execution failed for task ‘:compileJava’.
    Could not find tools.jar. Please check that /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.161-2.b14.el7.x86_64/jre contains a valid JDK installation.

  • Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED in 0s
2 actionable tasks: 2 executed

$alternatives --config java

3 プログラムがあり ‘java’ を提供します。

選択 コマンド

*+ 1 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0. 161-2.b14.el7.x86_64/jre/bin/java)
2 java-1.7.0-openjdk.x86_64 (/usr/lib/jvm/java-1.7.0-openjdk-1.7.0. 171-2.6.13.2.el7.x86_64/jre/bin/java)
3 /usr/java/jdk1.8.0_171-amd64/jre/bin/java