NullPointer exception in SASLMechanism

[sunish_kumar]

I am using Smack 4.3.4 in Android application to connect to eJabberd server.

The app crashes many times with the following error trace.

Fatal Exception: java.lang.NullPointerException: Attempt to invoke interface method ‘java.lang.String java.lang.CharSequence.toString()’ on a null object reference
at java.text.Normalizer.normalize(Normalizer.java:166)
at org.jivesoftware.smack.sasl.SASLMechanism.saslPrep(SASLMechanism.java:2)
at org.jivesoftware.smack.sasl.core.ScramMechanism.getAuthenticationText(ScramMechanism.java:8)
at org.jivesoftware.smack.sasl.SASLMechanism.authenticate(SASLMechanism.java)
at org.jivesoftware.smack.sasl.SASLMechanism.authenticate(SASLMechanism.java:15)
at org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:44)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.loginInternal(XMPPTCPConnection.java:21)
at org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:40)
at org.jivesoftware.smack.AbstractXMPPConnection.login(AbstractXMPPConnection.java:40)
at org.jivesoftware.smack.ReconnectionManager$2.run(ReconnectionManager.java:146)
at java.lang.Thread.run(Thread.java:764)

Can you please help in identifying what may be wrong?

Thanks in Advance,

Sunish Kumar

[Paul_Schaub]

Hi Sunish,
this is hard to debug without further information.

It appears that for some reason authenticationId is null here.
Is it possible that you try to authenticate with a null username?