eclipse-vertx/vert.x · error · IllegalArgumentException

reconnect interval must be >= 1

Error message

reconnect interval must be >= 1

What it means

Configuration validation in QuicClientConfig.setReconnectInterval: the delay between reconnection attempts must be strictly positive (both zero and negative Durations are rejected). A non-positive interval would busy-loop reconnections.

Source

Thrown at vertx-core/src/main/java/io/vertx/core/net/QuicClientConfig.java:199

    return this;
  }

  /**
   * @return  the value of reconnect interval
   */
  public Duration getReconnectInterval() {
    return reconnectInterval;
  }

  /**
   * Set the reconnect interval
   *
   * @param interval  the reconnect interval
   * @return a reference to this, so the API can be used fluently
   */
  public QuicClientConfig setReconnectInterval(Duration interval) {
    if (interval.isNegative() || interval.isZero()) {
      throw new IllegalArgumentException("reconnect interval must be >= 1");
    }
    this.reconnectInterval = interval;
    return this;
  }
}

View on GitHub (pinned to fb308bd8c3)

Solutions

1. Pass a positive Duration such as Duration.ofSeconds(1)
2. Validate externally configured reconnect settings

When it happens

Trigger: Thrown at vertx-core/src/main/java/io/vertx/core/net/QuicClientConfig.java:199 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of eclipse-vertx/vert.x@fb308bd8c3 (2026-09-06). Data as JSON: /api/errors/536bcb43f154493c. Report an issue: GitHub.