<style>
/* Changing the layout to use less space for mobiles */
@media screen and (max-device-width: 480px), screen and (-webkit-min-device-pixel-ratio: 2) {
#email-body { min-width: 30em !important; }
#email-page { padding: 8px !important; }
#email-banner { padding: 8px 8px 0 8px !important; }
#email-avatar { margin: 1px 8px 8px 0 !important; padding: 0 !important; }
#email-fields { padding: 0 8px 8px 8px !important; }
#email-gutter { width: 0 !important; }
}
</style>
<div id="email-body">
<table id="email-wrap" align="center" border="0" cellpadding="0" cellspacing="0" style="background-color:#f0f0f0;color:#000000;width:100%;">
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<td id="email-page" style="padding:16px !important;">
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<td bgcolor="#003366" style="background-color:#003366;color:#ffffff;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;line-height:1;"><img src="http://jira.qos.ch/s/en_USb9v8he-418945332/850/25/_/jira-logo-scaled.png" alt="" style="vertical-align:top;" /></td>
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<td id="email-banner" style="padding:32px 32px 0 32px;">
<table align="left" border="0" cellpadding="0" cellspacing="0" width="100%" style="width:100%;">
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<td style="color:#505050;font-family:Arial,FreeSans,Helvetica,sans-serif;padding:0;">
<img id="email-avatar" src="http://jira.qos.ch/secure/useravatar?avatarId=10122" alt="" height="48" width="48" border="0" align="left" style="padding:0;margin: 0 16px 16px 0;" />
<div id="email-action" style="padding: 0 0 8px 0;font-size:12px;line-height:18px;">
<a class="user-hover" rel="pvlugter" id="email_pvlugter" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=pvlugter" style="color:#326ca6;">Peter Vlugter</a>
commented on <img src="http://jira.qos.ch/images/icons/issuetypes/bug.png" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#326ca6;text-decoration:none;' href='http://jira.qos.ch/browse/LOGBACK-142'>LOGBACK-142</a>
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<div id="email-summary" style="font-size:16px;line-height:20px;padding:2px 0 16px 0;">
<a style='color:#326ca6;text-decoration:none;' href='http://jira.qos.ch/browse/LOGBACK-142'><strong>Logback Context is not thread safe, throws java.util.ConcurrentModificationException</strong></a>
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<td id="email-fields" style="padding:0 32px 32px 32px;">
<table border="0" cellpadding="0" cellspacing="0" style="padding:0;text-align:left;width:100%;" width="100%">
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<td id="email-gutter" style="width:64px;white-space:nowrap;"></td>
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<div class="comment-block" style="background-color:#edf5ff;border:1px solid #dddddd;color:#000000;padding:12px;"><p>I'm seeing a similar <tt>ConcurrentModificationException</tt> but in a different hash map (one in <tt>ContextBase</tt>).</p>
<p>Is configuration expected to be thread-safe? Should I create a new issue?</p>
<p>The calling code is here: <a href="https://github.com/playframework/playframework/blob/2.3.6/framework/src/play/src/main/scala/play/api/Logger.scala#L256" class="external-link">https://github.com/playframework/playframework/blob/2.3.6/framework/src/play/src/main/scala/play/api/Logger.scala#L256</a></p>
<p>Example stack trace:</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
at java.util.HashMap$EntryIterator.next(HashMap.java:962)
at java.util.HashMap$EntryIterator.next(HashMap.java:960)
at java.util.HashMap.putAllForCreate(HashMap.java:554)
at java.util.HashMap.<init>(HashMap.java:298)
at ch.qos.logback.core.ContextBase.getCopyOfPropertyMap(ContextBase.java:68)
at ch.qos.logback.classic.spi.LoggerContextVO.<init>(LoggerContextVO.java:46)
at ch.qos.logback.classic.LoggerContext.updateLoggerContextVO(LoggerContext.java:86)
at ch.qos.logback.classic.LoggerContext.putProperty(LoggerContext.java:92)
at ch.qos.logback.core.util.ContextUtil.addHostNameAsProperty(ContextUtil.java:75)
at ch.qos.logback.classic.joran.action.ConfigurationAction.begin(ConfigurationAction.java:57)
at ch.qos.logback.core.joran.spi.Interpreter.callBeginAction(Interpreter.java:275)
at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:147)
at ch.qos.logback.core.joran.spi.Interpreter.startElement(Interpreter.java:129)
at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:50)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:149)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:135)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:99)
at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:49)
</pre>
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<td style="color:#505050;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:10px;line-height:14px;padding: 0 16px 16px 16px;text-align:center;">
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