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Editorial Team
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Asked: 2026-05-29T10:43:43+00:00

I am facing this error while running my GWT application. I have these jar

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I am facing this error while running my GWT application.

I have these jar files in my classpath: slf4j-api & slf4j-log4j12

Any idea what could be the reason?

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1 Answer

  1. Editorial Team

    This problem is due to a change in slf4j-log4j12 jar. From version 1.5.6 it doesn’t allow to access the field org.slf4j.impl.StaticLoggerBinder.SINGLETON.

    To resolve it, use the newest jars (or at least version 1.5.6 onward) for both slf4j-api & slf4j-log4j12.

    <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>1.5.6</version>
</dependency>

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.5.6</version>
</dependency>
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