rapper.html#startAsync-jakarta.servlet.ServletRequest-jakarta.servlet.ServletResponse-"><code>startAsync(ServletRequest,ServletResponse)</code></a> on the wrapped request</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - if this request has not been put into asynchronous mode, i.e., if neither
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