[Question] NVIDIA配置阈值规则报错

[Lee-1024]

Question

alert expr error: org.apache.hertzbeat.common.util.JexlExpressionRunner.compile:79@1:40 tokenization error in ''，请问这是什么原因

[harshita2626]

Root Causes 1.Empty Expression: The error shows tokenization error in '', suggesting an empty string was passed as the expression.

2.Expression Syntax Error: The JEXL (Java Expression Language) expression may contain:

Missing operators

Unmatched parentheses

Unsupported syntax

Incorrect variable reference format

3.Special Character Issue: The expression might contain unescaped special characters.

Recommended Solutions 1.Verify Expression Isn't Empty: Ensure you're not passing an empty string as the alert expression.

2.Validate Expression Syntax:

Use proper JEXL syntax

Check for balanced parentheses

Confirm correct variable reference format (e.g., ${metric} or metric)

3.Test with Simplified Expression:

// Example simple expressions
value > 10
// or
${cpu.usage} > 80``