每次都会出现此错误：
Jul 24, 2017 4:41:35 AM org.restlet.engine.application.StatusFilter doHandle
WARNING: Exception or error caught by status service
java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;Ljava/lang/Throwable;)V
at org.apache.commons.logging.impl.SLF4JLocationAwareLog.debug(SLF4JLocationAwareLog.java:133)
at org.apache.http.client.protocol.RequestAuthCache.process(RequestAuthCache.java:76)
at org.apache.http.protocol.ImmutableHttpProcessor.process(ImmutableHttpProcessor.java:132)
at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:182)
at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:88)
at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:184)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:82)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:107)
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:55)
at com.mashape.unirest.http.HttpClientHelper.request(HttpClientHelper.java:138)
at com.mashape.unirest.request.BaseRequest.asString(BaseRequest.java:56)
这是一个快速mvn dependency:tree
mvn dependency:tree | find "slf4j"
[INFO] +- org.slf4j:slf4j-api:jar:1.7.7:compile
[INFO] | +- org.slf4j:slf4j-api:jar:1.7.7:provided
[INFO] | +- org.slf4j:slf4j-api:jar:1.7.7:compile
[INFO] | +- org.slf4j:slf4j-api:jar:1.7.7:compile
[INFO] | | +- org.slf4j:slf4j-log4j12:jar:1.7.7:compile