[HADOOP-9645] KerberosAuthenticator NPEs on connect error

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Duplicate
• Affects Version/s: 2.0.5-alpha
• Component/s: fs
• Assignee: Unassigned
• Reporter: Daryn Sharp
• Created: 14/Jun/13 13:47
• Updated: 24/Mar/16 16:48
• Resolved: 24/Mar/16 16:48

Description

A NPE occurs if there's a kerberos error during initial connect. In this case, the NN was using a HTTP service principal with a stale kvno. It causes webhdfs to fail in a non-user friendly manner by masking the real error from the user.

java.lang.RuntimeException: java.lang.NullPointerException
        at
sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1241)
        at
sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:2713)
        at
java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:477)
        at
org.apache.hadoop.security.authentication.client.KerberosAuthenticator.isNegotiate(KerberosAuthenticator.java:164)
        at
org.apache.hadoop.security.authentication.client.KerberosAuthenticator.authenticate(KerberosAuthenticator.java:140)
        at
org.apache.hadoop.security.authentication.client.AuthenticatedURL.openConnection(AuthenticatedURL.java:217)
        at
org.apache.hadoop.hdfs.web.WebHdfsFileSystem.openHttpUrlConnection(WebHdfsFileSystem.java:364)

Issue Links

• duplicates: HADOOP-9363 AuthenticatedURL will NPE if server closes connection