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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/SLF4J" style="color: #3b73af; text-decoration: none">SLF4J</a> / <a href="http://jira.qos.ch/browse/SLF4J-368" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-f8f42f8a-e5b6-40c9-973e-597fa06214da" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="http://jira.qos.ch/browse/SLF4J-368" style="color: #3b73af; text-decoration: none">SLF4J-368</a>
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<td style="vertical-align: top;; padding: 0px; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="http://jira.qos.ch/browse/SLF4J-368" style="color: #3b73af; text-decoration: none">log4j-over-slf4j inheritance must be similar to lo4j one</a> </span>
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Issue Type:
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<td class="has-icon" style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-bug-f8f42f8a-e5b6-40c9-973e-597fa06214da" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /> Bug
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Affects Versions:
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1.7.13
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Assignee:
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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="slf4j-dev@qos.ch" id="email_slf4j-dev@qos.ch" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=slf4j-dev%40qos.ch" style="color:#3b73af;; color: #3b73af; text-decoration: none">SLF4J developers list</a>
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Components:
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log4j-over-slf4j
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Created:
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11/May/16 7:28 PM
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Priority:
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Reporter:
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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="tivv00" id="email_tivv00" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=tivv00" style="color:#3b73af;; color: #3b73af; text-decoration: none">Vitalii Tymchyshyn</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Currently log4j-over-slf4j classes inheritance do not resemble log4j inheritance, e.g. appenders like RollingFileAppeder not implementing Appender.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">This leads to Errors thrown from any code trying to programmatically configure log4j, like in velocity (see below). What makes things worse is that the calling code often expects exceptions and handles, but it does not expect errors.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Please see error thrown out of velocity initializer:</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">
Caused by: java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.<span class="code-object" style="color: #910091">ClassLoader</span>.defineClass1(Native Method)
at java.lang.<span class="code-object" style="color: #910091">ClassLoader</span>.defineClass(<span class="code-object" style="color: #910091">ClassLoader</span>.java:760)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.<span class="code-object" style="color: #910091">ClassLoader</span>.loadClass(<span class="code-object" style="color: #910091">ClassLoader</span>.java:424)
at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:89)
at java.lang.<span class="code-object" style="color: #910091">ClassLoader</span>.loadClass(<span class="code-object" style="color: #910091">ClassLoader</span>.java:357)
at org.apache.velocity.runtime.log.Log4JLogChute.initAppender(Log4JLogChute.java:118)
at org.apache.velocity.runtime.log.Log4JLogChute.init(Log4JLogChute.java:85)
at org.apache.velocity.runtime.log.LogManager.createLogChute(LogManager.java:157)
at org.apache.velocity.runtime.log.LogManager.updateLog(LogManager.java:269)
at org.apache.velocity.runtime.RuntimeInstance.initializeLog(RuntimeInstance.java:871)
at org.apache.velocity.runtime.RuntimeInstance.init(RuntimeInstance.java:262)
at org.apache.velocity.app.VelocityEngine.init(VelocityEngine.java:93)
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