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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">Not in form of unit test, but simple program.</p> <p style="margin: 10px 0 0 0"> </p> 
                                                        <div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -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; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.classic.AsyncAppender;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.classic.Logger;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.classic.LoggerContext;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.classic.joran.JoranConfigurator;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.classic.spi.ILoggingEvent;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.core.Appender;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.core.joran.spi.JoranException;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.core.rolling.RollingFileAppender;
<span class="code-keyword" style="color: #000091">import</span> ch.qos.logback.core.util.StatusPrinter;
<span class="code-keyword" style="color: #000091">import</span> com.google.common.collect.ImmutableMultimap;
<span class="code-keyword" style="color: #000091">import</span> java.io.ByteArrayInputStream;
<span class="code-keyword" style="color: #000091">import</span> java.io.InputStreamReader;
<span class="code-keyword" style="color: #000091">import</span> java.io.PrintWriter;
<span class="code-keyword" style="color: #000091">import</span> java.sql.CallableStatement;
<span class="code-keyword" style="color: #000091">import</span> java.util.Iterator;
<span class="code-keyword" style="color: #000091">import</span> java.util.Map;
<span class="code-keyword" style="color: #000091">import</span> org.slf4j.LoggerFactory;
<span class="code-keyword" style="color: #000091">import</span> org.xml.sax.InputSource;

/**
 * @author Stanislav Doktorovich
 * @since 2017-05-19
 */
<span class="code-keyword" style="color: #000091">public</span> class LogbackNPE
{
    <span class="code-keyword" style="color: #000091">private</span> <span class="code-keyword" style="color: #000091">static</span> void configureLogback()
    {
        <span class="code-comment" style="color: #808080">// assume SLF4J is bound to logback in the current environment
</span>        LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();

        <span class="code-keyword" style="color: #000091">try</span>
        {
            JoranConfigurator configurator = <span class="code-keyword" style="color: #000091">new</span> JoranConfigurator();
            configurator.setContext(context);
            <span class="code-comment" style="color: #808080">// Call context.reset() to clear any previous configuration, e.g. <span class="code-keyword" style="color: #000091; color: #808080">default</span>
</span>            <span class="code-comment" style="color: #808080">// configuration. For multi-step configuration, omit calling context.reset().
</span>            context.reset();
            <span class="code-object" style="color: #910091">String</span> config = <span class="code-quote" style="color: #009100">"<configuration debug=\"</span><span class="code-keyword" style="color: #000091">false</span>\<span class="code-quote" style="color: #009100">" scan=\"</span><span class="code-keyword" style="color: #000091">false</span>\<span class="code-quote" style="color: #009100">">\n"</span> +
                            <span class="code-quote" style="color: #009100">"    <appender name=\"</span>FILE\<span class="code-quote" style="color: #009100">" class=\"</span>ch.qos.logback.core.rolling.RollingFileAppender\<span class="code-quote" style="color: #009100">">\n"</span> +
                            <span class="code-quote" style="color: #009100">"        <file>${prosrm.install.home}/log/1.log</file>\n"</span> +
                            <span class="code-quote" style="color: #009100">"        <rollingPolicy class=\"</span>ch.qos.logback.core.rolling.TimeBasedRollingPolicy\<span class="code-quote" style="color: #009100">">\n"</span> +
                            <span class="code-quote" style="color: #009100">"            <!-- daily rollover -->\n"</span> +
                            <span class="code-quote" style="color: #009100">"            <fileNamePattern>${prosrm.install.home}/log/1.log.%d{yyyyMMdd}</fileNamePattern>\n"</span> +
                            <span class="code-quote" style="color: #009100">"            <maxHistory>3</maxHistory>\n"</span> +
                            <span class="code-quote" style="color: #009100">"            <totalSizeCap>1GB</totalSizeCap>\n"</span> +
                            <span class="code-quote" style="color: #009100">"        </rollingPolicy>\n"</span> +
                            <span class="code-quote" style="color: #009100">"    </appender>\n"</span> +
                            <span class="code-quote" style="color: #009100">"    <root level=\"</span>INFO\<span class="code-quote" style="color: #009100">">\n"</span> +
                            <span class="code-quote" style="color: #009100">"        <appender-ref ref=\"</span>FILE\<span class="code-quote" style="color: #009100">" />\n"</span> +
                            <span class="code-quote" style="color: #009100">"    </root>\n"</span> +
                            <span class="code-quote" style="color: #009100">"</configuration>"</span>;
            configurator.doConfigure(<span class="code-keyword" style="color: #000091">new</span> ByteArrayInputStream(config.getBytes()));
        }
        <span class="code-keyword" style="color: #000091">catch</span> (JoranException je)
        {
            <span class="code-comment" style="color: #808080">// StatusPrinter will handle <span class="code-keyword" style="color: #000091; color: #808080">this</span>
</span>        }
        StatusPrinter.printInCaseOfErrorsOrWarnings(context);
    }

    <span class="code-keyword" style="color: #000091">private</span> <span class="code-keyword" style="color: #000091">static</span> void npe() <span class="code-keyword" style="color: #000091">throws</span> Exception
    {

        <span class="code-comment" style="color: #808080">// assume SLF4J is bound to logback in the current environment
</span>        LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();

        Logger logger = loggerContext.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);
        rollover(logger.iteratorForAppenders());
    }

    <span class="code-keyword" style="color: #000091">private</span> <span class="code-keyword" style="color: #000091">static</span> void rollover(Iterator<Appender<ILoggingEvent>> it)
    {
        <span class="code-keyword" style="color: #000091">for</span> (; it.hasNext(); )
        {
            Appender<ILoggingEvent> appender = it.next();
            <span class="code-keyword" style="color: #000091">if</span> (appender <span class="code-keyword" style="color: #000091">instanceof</span> RollingFileAppender)
            {
                RollingFileAppender rollingFileAppender = (RollingFileAppender) appender;
                rollingFileAppender.rollover();
            }
            <span class="code-keyword" style="color: #000091">else</span> <span class="code-keyword" style="color: #000091">if</span> (appender <span class="code-keyword" style="color: #000091">instanceof</span> AsyncAppender)
            {
                AsyncAppender asyncAppender = (AsyncAppender) appender;
                rollover(asyncAppender.iteratorForAppenders());
            }
        }
    }

    <span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> void main(<span class="code-object" style="color: #910091">String</span>[] args) <span class="code-keyword" style="color: #000091">throws</span> Exception
    {
        configureLogback();
        npe();
    }
}

</pre> 
                                                            </div>
                                                        </div> <p style="margin: 10px 0 0 0">output:</p> 
                                                        <div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px 3px 3px 3px; border-radius: 3px 3px 3px 3px; margin: 9px 0">
                                                            <div class="codeContent panelContent" style="padding: 9px 12px"> 
                                                                <pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
Exception in thread <span class="code-quote" style="color: #009100">"main"</span> java.lang.NullPointerException
at ch.qos.logback.core.rolling.helper.FileFilterUtil.afterLastSlash(FileFilterUtil.java:46)
at ch.qos.logback.core.rolling.TimeBasedRollingPolicy.rollover(TimeBasedRollingPolicy.java:166)
at ch.qos.logback.core.rolling.RollingFileAppender.attemptRollover(RollingFileAppender.java:211)
at ch.qos.logback.core.rolling.RollingFileAppender.rollover(RollingFileAppender.java:190)
at LogbackNPE.rollover(LogbackNPE.java:79)
at LogbackNPE.npe(LogbackNPE.java:68)
at LogbackNPE.main(LogbackNPE.java:92)
20:46:11,222 |-INFO in ch.qos.logback.classic.LoggerContext[<span class="code-keyword" style="color: #000091">default</span>] - Could NOT find resource [logback-test.xml]
20:46:11,223 |-INFO in ch.qos.logback.classic.LoggerContext[<span class="code-keyword" style="color: #000091">default</span>] - Could NOT find resource [logback.groovy]
20:46:11,223 |-INFO in ch.qos.logback.classic.LoggerContext[<span class="code-keyword" style="color: #000091">default</span>] - Could NOT find resource [logback.xml]
20:46:11,228 |-INFO in ch.qos.logback.classic.BasicConfigurator@27abe2cd - Setting up <span class="code-keyword" style="color: #000091">default</span> configuration.
20:46:11,372 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
20:46:11,372 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.rolling.RollingFileAppender]
20:46:11,381 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [FILE]
20:46:11,408 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1599771323 - setting totalSizeCap to 1 GB
20:46:11,424 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1599771323 - No compression will be used
20:46:11,426 |-INFO in c.q.l.core.rolling.TimeBasedRollingPolicy@1599771323 - Will use the pattern prosrm.install.home_IS_UNDEFINED/log/1.log.%d{yyyyMMdd} <span class="code-keyword" style="color: #000091">for</span> the active file
20:46:11,431 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyyMMdd' from file name pattern 'prosrm.install.home_IS_UNDEFINED/log/1.log.%d{yyyyMMdd}'.
20:46:11,431 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll-over at midnight.
20:46:11,437 |-INFO in c.q.l.core.rolling.DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Fri May 19 20:46:11 ALMT 2017
20:46:11,444 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - Active log file name: prosrm.install.home_IS_UNDEFINED/log/1.log
20:46:11,444 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - File property is set to [prosrm.install.home_IS_UNDEFINED/log/1.log]
20:46:11,447 |-WARN in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - Encoder has not been set. Cannot invoke its init method.
20:46:11,447 |-ERROR in ch.qos.logback.core.rolling.RollingFileAppender[FILE] - No encoder set <span class="code-keyword" style="color: #000091">for</span> the appender named <span class="code-quote" style="color: #009100">"FILE"</span>.
20:46:11,448 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to INFO
20:46:11,448 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [FILE] to Logger[ROOT]
20:46:11,448 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
20:46:11,448 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@6fdb1f78 - Registering current configuration as safe fallback point
</pre> 
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                                                        </div> </td> 
                                                </tr> 
                                            </tbody>
                                        </table> </td> 
                                </tr> 
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                                    <td class="email-content-main mobile-expand " style="padding: 0px; border-collapse: collapse; border-left: 1px solid #cccccc; border-right: 1px solid #cccccc; border-top: 0; border-bottom: 0; padding: 0 15px 0 16px; background-color: #ffffff" bgcolor="#ffffff"> 
                                        <table id="actions-pattern" cellspacing="0" cellpadding="0" border="0" width="100%" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 1px"> 
                                            <tbody>
                                                <tr> 
                                                    <td id="actions-pattern-container" valign="middle" style="padding: 0px; border-collapse: collapse; padding: 10px 0 10px 24px; vertical-align: middle; padding-left: 0"> 
                                                        <table align="left" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt"> 
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                                                                    <td class="actions-pattern-action-icon-container" style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 0px; vertical-align: middle"> <a href="https://jira.qos.ch/browse/LOGBACK-995#add-comment" target="_blank" title="Add Comment" style="color: #3b73af; text-decoration: none"> <img class="actions-pattern-action-icon-image" src="cid:jira-generated-image-static-comment-icon-36df6512-6aa5-4b03-ba62-193bc52aee6e" alt="Add Comment" title="Add Comment" height="16" width="16" border="0" style="vertical-align: middle"> </a> </td> 
                                                                    <td class="actions-pattern-action-text-container" style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px; mso-line-height-rule: exactly; mso-text-raise: 4px; padding-left: 5px"> <a href="https://jira.qos.ch/browse/LOGBACK-995#add-comment" target="_blank" title="Add Comment" style="color: #3b73af; text-decoration: none">Add Comment</a> </td> 
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                                <!-- there needs to be content in the cell for it to render in some clients --> 
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                                    <td class="email-content-rounded-bottom mobile-expand" style="padding: 0px; border-collapse: collapse; color: #ffffff; padding: 0 15px 0 16px; height: 5px; line-height: 5px; background-color: #ffffff; border-top: 0; border-left: 1px solid #cccccc; border-bottom: 1px solid #cccccc; border-right: 1px solid #cccccc; border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; mso-line-height-rule: exactly" height="5" bgcolor="#ffffff"> </td> 
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                    <td id="footer-pattern" style="padding: 0px; border-collapse: collapse; padding: 12px 20px"> 
                        <table id="footer-pattern-container" cellspacing="0" cellpadding="0" border="0" style="border-collapse: collapse; mso-table-lspace: 0pt; mso-table-rspace: 0pt"> 
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                                    <td id="footer-pattern-text" class="mobile-resize-text" width="100%" style="padding: 0px; border-collapse: collapse; color: #999999; font-size: 12px; line-height: 18px; font-family: Arial, sans-serif; mso-line-height-rule: exactly; mso-text-raise: 2px"> This message was sent by Atlassian JIRA <span id="footer-build-information">(v7.3.1#73012-<span title="68837e38d8ed1b069612405186dcdceed665bb39" data-commit-id="68837e38d8ed1b069612405186dcdceed665bb39}">sha1:68837e3</span>)</span> </td> 
                                    <td id="footer-pattern-logo-desktop-container" valign="top" style="padding: 0px; border-collapse: collapse; padding-left: 20px; vertical-align: top"> 
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                                                    <td id="footer-pattern-logo-desktop-padding" style="padding: 0px; border-collapse: collapse; padding-top: 3px"> <img id="footer-pattern-logo-desktop" src="cid:jira-generated-image-static-footer-desktop-logo-71326ed7-2cac-4f80-81d6-1064b5500b31" alt="Atlassian logo" title="Atlassian logo" width="169" height="36" class="image_fix"> </td> 
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