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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="http://jira.qos.ch/browse/LOGBACK" style="color: #3b73af; text-decoration: none">logback</a> / <a href="http://jira.qos.ch/browse/LOGBACK-1164" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-b720d86a-1e4e-4805-a620-35fa839f10f4" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="http://jira.qos.ch/browse/LOGBACK-1164" style="color: #3b73af; text-decoration: none">LOGBACK-1164</a>
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Issue Type:
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Affects Versions:
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1.1.7
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="logback-dev@qos.ch" id="email_logback-dev@qos.ch" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=logback-dev%40qos.ch" style="color:#3b73af;; color: #3b73af; text-decoration: none">Logback dev list</a>
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Components:
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logback-core
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Created:
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06/Apr/16 4:34 AM
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configuration
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="philsttr" id="email_philsttr" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=philsttr" style="color:#3b73af;; color: #3b73af; text-decoration: none">Phil</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">In logback 1.1.7, <a href="https://github.com/qos-ch/logback/blob/v_1.1.7/logback-core/src/main/java/ch/qos/logback/core/joran/util/beans/BeanDescriptionFactory.java" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none"><tt>BeanDescriptionFactory</tt></a> was introduced in <a href="https://github.com/qos-ch/logback/commit/3aa7822abbff8f97170c36f21472974c670d5395" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">this commit</a>.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><tt>BeanDescriptionFactory</tt> incorrectly prints the following warnings for classes containing <a href="https://docs.oracle.com/javase/tutorial/java/generics/bridgeMethods.html" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">bridge methods</a>:</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Warning: <span class="code-object" style="color: #910091">Class</span> '%s' contains multiple setters <span class="code-keyword" style="color: #000091">for</span> the same property '%s'.
Warning: <span class="code-object" style="color: #910091">Class</span> '%s' contains multiple adders <span class="code-keyword" style="color: #000091">for</span> the same property '%s'.
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0"><tt>BeanDescriptionFactory</tt> should ignore <a href="https://docs.oracle.com/javase/tutorial/java/generics/bridgeMethods.html" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">bridge methods</a>.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">This could be fixed easily by adding:</p>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">if</span> (method.isBridge()) {
<span class="code-keyword" style="color: #000091">continue</span>;
}
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">in the for loop, before the <a href="https://github.com/qos-ch/logback/blob/v_1.1.7/logback-core/src/main/java/ch/qos/logback/core/joran/util/beans/BeanDescriptionFactory.java#L34" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">first if condition</a>.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">This can be reproduced by using a class with a bridge method in logback's configuration. For example:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #ccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #ccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">public</span> class ConfigFoo<T> {
<span class="code-keyword" style="color: #000091">private</span> T bar;
<span class="code-keyword" style="color: #000091">public</span> void setBar(T bar) {
<span class="code-keyword" style="color: #000091">this</span>.bar = bar;
}
}
<span class="code-keyword" style="color: #000091">public</span> class IntegerConfigFoo <span class="code-keyword" style="color: #000091">extends</span> ConfigFoo<T> {
<span class="code-keyword" style="color: #000091">public</span> void setBar(<span class="code-object" style="color: #910091">Integer</span> bar) {
<span class="code-keyword" style="color: #000091">super</span>.setBar(bar);
<span class="code-comment" style="color: #808080">// <span class="code-keyword" style="color: #000091; color: #808080">do</span> something <span class="code-keyword" style="color: #000091; color: #808080">else</span>
</span> }
}
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">In this case <tt>IntegerConfigFoo</tt> will have a <tt>setBar(Object)</tt> bridge method AND a <tt>setBar(Integer)</tt> method. Logback should ignore the <tt>setBar(Object)</tt> bridge method.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">This is causing issues for <a href="https://github.com/logstash/logstash-logback-encoder/issues/160" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">logstash-logback-encoder</a></p>
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