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<h4>UnavailableException</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a>
public&nbsp;UnavailableException(<a href="../../jakarta/servlet/Servlet.html" title="interface in jakarta.servlet">Servlet</a>&nbsp;servlet,
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