Httpfs return code 500 with HDP3.1.5

[#1]

Hi, My hadoop cluster use HDP3.1.5-152.0, I start httpfs in cli command, and my webhdfs is work fine. But when i send request to the httpfs service , i got 500 code error like this:

15:50:39,064  WARN ServletHandler:632 - /webhdfs/v1/user
java.lang.IllegalArgumentException: Empty key
        at javax.crypto.spec.SecretKeySpec.<init>(SecretKeySpec.java:96)
        at org.apache.hadoop.security.authentication.util.Signer.computeSignature(Signer.java:93)
        at org.apache.hadoop.security.authentication.util.Signer.sign(Signer.java:59)
        at org.apache.hadoop.security.authentication.server.AuthenticationFilter.doFilter(AuthenticationFilter.java:587)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1751)
        at org.apache.hadoop.http.HttpServer2$QuotingInputFilter.doFilter(HttpServer2.java:1619)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
        at org.apache.hadoop.http.NoCacheFilter.doFilter(NoCacheFilter.java:45)
        at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1759)
        at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
        at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
        at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
        at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1180)
        at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:512)
        at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
        at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1112)
        at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
        at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:119)
        at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
        at org.eclipse.jetty.server.Server.handle(Server.java:539)
        at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:333)
        at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)
        at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:251)
        at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:283)
        at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:108)
        at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.executeProduceConsume(ExecuteProduceConsume.java:303)
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceConsume(ExecuteProduceConsume.java:148)
        at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:136)
        at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:671)
        at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:589)
        at java.lang.Thread.run(Thread.java:745)

 This error occurs regardless of whether my cluster has kerberos and ssl enabled, Please give me some help, thanks!

[#2]

Hi Team, it does looks like a syntax error "Empty key" could you please confirm the API you are passing has the key can you share it here