Testng Log4J 2:未捕获的异常：未记录到文件

我正在使用log4j2以及TestNG和java7以及IntelliJ作为web自动化项目的IDE

我试图将所有未捕获异常的标准错误输出重定向到具有级别错误的log4j2日志文件

我创建了一个名为

Log4J2UncaughtExceptionHandler

的

UncaughtExceptionHandler

的子类，用于将未捕获的异常记录到输出日志文件中：

public class Log4JUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        logger.error(e);
    }
}

然后在代码中，我将默认的

UncaughtExceptionHandler

设置为这个新创建的处理程序实例：

Thread.setDefaultUncaughtExceptionHandler(log4JUncaughtExceptionHandler);

…然后我验证了

UncaughtExceptionHandler

是否已更改：

// Prints "2016-10-31 15:15:19,623 INFO  [Test worker] plugins.Log4JUtils (Log4JUtils.java:89) - test.java.utils.Log4JUncaughtExceptionHandler@118414c5"
Log4JUtils.logInfo(Thread.getDefaultUncaughtExceptionHandler().toString());

…但我提出了一个意外的例外：

String s = null;
s.charAt(0);

…尽管

NullPointerException

被记录到IntelliJ的控制台，但它不会显示在我将错误指向的错误文件中

此外，当我在上面的

uncaughtException（）

方法中放置调试点时，调试器不会停止在那里

我不知道为什么会发生这样的事情。是否有一些异常不是由

UncaughtExceptionHandlers

跟踪的

堆栈跟踪 这是堆栈跟踪。我还应该注意到，上面的测试包括使用Selenium和具有渐变构建的Firefox的测试。我在一个测试用例的开头插入了

NullPointerException

语句

3:14:59 PM: Executing external task 'DEBUG_qa1TestFirefox'...
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:compileTestJava UP-TO-DATE
:processTestResources UP-TO-DATE
:testClasses UP-TO-DATE
Connected to the target VM, address: '127.0.0.1:56873', transport: 'socket'
:DEBUG_qa1TestFirefox

Default Suite STANDARD_OUT
    2016-10-31 15:15:08,044 INFO  [Test worker] plugins.Log4JUtils (Log4JUtils.java:89) - 
    -----------------------------------------------------------------------------
    ------------ The test is starting now at 2016-10-31-15-15-08-031 ------------
    -----------------------------------------------------------------------------
    15:15:08.044 [Test worker] INFO  test.java.utils.plugins.Log4JUtils - 
    -----------------------------------------------------------------------------
    ------------ The test is starting now at 2016-10-31-15-15-08-031 ------------
    -----------------------------------------------------------------------------

Default Suite > Firefox STANDARD_OUT
    2016-10-31 15:15:08,084 INFO  [Test worker] plugins.Log4JUtils (Log4JUtils.java:89) - 
    -------------------------------------------------
    ------------ Testing case #[6.0]: [] ------------
    -------------------------------------------------
    15:15:08.084 [Test worker] INFO  test.java.utils.plugins.Log4JUtils - 
    -------------------------------------------------
    ------------ Testing case #[6.0]: [] ------------
    -------------------------------------------------
    2016-10-31 15:15:16,862 INFO  [Test worker] plugins.Log4JUtils (Log4JUtils.java:89) - Browser opened in FIREFOX
    15:15:16.862 [Test worker] INFO  test.java.utils.plugins.Log4JUtils - Browser opened in FIREFOX

Default Suite > Firefox > test.java.<censored> STANDARD_OUT
    2016-10-31 15:15:19,623 INFO  [Test worker] plugins.Log4JUtils (Log4JUtils.java:89) - test.java.utils.Log4JUncaughtExceptionHandler@118414c5
    15:15:19.623 [Test worker] INFO  test.java.utils.plugins.Log4JUtils - test.java.utils.Log4JUncaughtExceptionHandler@118414c5

Default Suite > Firefox > test.java.<censored> FAILED
    java.lang.NullPointerException at <censored>.java:543
Disconnected from the target VM, address: '127.0.0.1:56873', transport: 'socket'

1 test completed, 1 failed
There were failing tests. See the report at: file:///C:/Users/<censored>/build/reports/2016-10-31-03_15_04_628/Firefox/index.html

BUILD SUCCESSFUL

Total time: 29.899 secs
3:15:29 PM: External task execution finished 'DEBUG_qa1TestFirefox'.

处理程序的完整代码

---

你能在这里添加stacktrace日志吗。对于console.Hi nullpointer中的NPE，添加了堆栈跟踪。

test.java.utils。Log4JUncaughtExceptionHandler@118414c5

表示正在联系处理程序。至于为什么不登录文件取决于用于log4jAlso的配置，我建议共享处理程序类、中断空指针和log4j配置的完整实现。我还一直在确保stdout和stderr也被定向到IntelliJ控制台和日志/错误文件。

@Test(groups = {group1, group2})
@TestMethodLabel(testNumber = 6, text = "")
public final void testMethod1() {

    // DEBUG PURPOSES ONLY: Force a NullPointerException to be thrown.
    Log4JUtils.logInfo(Thread.getDefaultUncaughtExceptionHandler().toString());

    String s = null;
    s.charAt(0);

    // <main test case code here>
}

package <censored>;

import <censored>;

/**
 * A handler for uncaught exceptions.
 */
public class Log4JUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {

    /**
     * Run any code necessary to handle the uncaught exception (e).
     *
     * Any exception thrown by this method will be ignored by the
     * Java Virtual Machine.
     *
     * @param t the thread from which the Exception has been declared.
     * @param e the exception to raise.
     */
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        Log4JUtils.OUTPUT_LOGGER.error(e.getStackTrace());
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
    <Appenders>
        <File name="STDOUT_FILE" fileName="${sys:logFilePath}" append="false">
            <PatternLayout pattern="%d %t %-5p %c{2} - %m%n"/>
            <Filters>
                <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
                <ThresholdFilter level="fatal" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
        </File>
        <File name="STDERR_FILE" fileName="${sys:errFilePath}" append="false">
            <PatternLayout pattern="%d %t %-5p %c{2} - %m%n"/>
        </File>
        <Console name="STDOUT" target="SYSTEM_OUT">
            <Filters>
                <ThresholdFilter level="error" onMatch="DENY" onMismatch="NEUTRAL"/>
                <ThresholdFilter level="fatal" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
            <PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
        </Console>
        <Console name="STDERR" target="SYSTEM_ERR">
            <PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
        </Console>
    </Appenders>
    <Loggers>
        <Logger name="test.java.utils.plugins.Log4JUtils" level="TRACE">
            <AppenderRef ref="STDERR" level="ERROR"/>
            <AppenderRef ref="STDOUT" level="INFO"/>
            <AppenderRef ref="STDOUT" level="WARN"/>
            <AppenderRef ref="STDERR" level="DEBUG"/>
            <AppenderRef ref="STDERR" level="FATAL"/>
            <AppenderRef ref="STDOUT" level="TRACE"/>
            <AppenderRef ref="STDERR_FILE" level="ERROR"/>
            <AppenderRef ref="STDOUT_FILE" level="INFO"/>
            <AppenderRef ref="STDOUT_FILE" level="WARN"/>
            <AppenderRef ref="STDERR_FILE" level="DEBUG"/>
            <AppenderRef ref="STDERR_FILE" level="FATAL"/>
            <AppenderRef ref="STDOUT_FILE" level="TRACE"/>
        </Logger>
    </Loggers>
</Configuration>

public class Log4JUtils {

    /**
     * The LOGGER for this class instance that writes output to log files.
     */
    private static final Logger OUTPUT_LOGGER = LogManager.getLogger(Log4JUtils.class.getName());

}