help!help!help!

[异彩飞天]

Good men:

When i run `mvn clean verify`, then 

[ERROR] Failed to execute goal com.lazerycode.jmeter:jmeter-maven-plugin:3.8.0:configure (configuration) on project yunhejia-api-test: Failed to collect dependencies at org.springframework:spring-webmvc:jar:4.3.7.RELEASE -> net.sf.jasperreports:jasperreports:jar:6.2.1 -> com.lowagie:itext:jar:2.1.7.js5-SNAPSHOT: Failed to read artifact descriptor for com.lowagie:itext:jar:2.1.7.js5-SNAPSHOT: The following artifacts could not be resolved: com.lowagie:itext:pom:2.1.7.js5-SNAPSHOT (absent): Could not transfer artifact com.lowagie:itext:pom:2.1.7.js5-SNAPSHOT from/to jaspersoft-third-party (http://jaspersoft.artifactoryonline.com/jaspersoft/third-party-ce-artifacts/): jaspersoft.artifactoryonline.com: Unknown host jaspersoft.artifactoryonline.com -> [Help 1]