Michael Ho created IMPALA-8111:
----------------------------------
Summary: Document workaround for some authentication issues with
KRPC
Key: IMPALA-8111
URL: https://issues.apache.org/jira/browse/IMPALA-8111
Project: IMPALA
Issue Type: Task
Components: Docs
Affects Versions: Impala 3.1.0, Impala 2.12.0
Reporter: Michael Ho
Assignee: Alex Rodoni
There have been complaints from users about not being able to use Impala after
upgrading to Impala version with KRPC enabled due to authentication issues.
Please document them in the known issues or best practice guide.
1. https://issues.apache.org/jira/browse/IMPALA-7585:
*Symptoms*: When using Impala with LDAP enabled, a user may hit the following:
{noformat}
Not authorized: Client connection negotiation failed: client connection to
127.0.0.1:27000: SASL(-1): generic failure: All-whitespace username.
{noformat}
*Root cause*: The following sequence can lead to the user "impala" not being
created in /etc/passwd.
{quote}time 1: no impala in LDAP; things get installed; impala created in
/etc/passwd
time 2: impala added to LDAP
time 3: new machine added
{quote}
*Workaround*:
- Manually edit /etc/passwd to add the impala user
- Upgrade to a version of Impala with the patch IMPALA-7585
2. https://issues.apache.org/jira/browse/IMPALA-7298
*Symptoms*: When running with Kerberos enabled, a user may hit the following
error:
{noformat}
WARNINGS: TransmitData() to X.X.X.X:27000 failed: Not authorized: Client
connection negotiation failed: client connection to X.X.X.X:27000: Server
impala/x.x....@vpc.cloudera.com not found in Kerberos database
{noformat}
*Root cause*:
KrpcDataStreamSender passes a resolved IP address when creating a proxy.
Instead, we should pass both the resolved address and the hostname when
creating the proxy so that we won't end up using the IP address as the hostname
in the Kerberos principal.
*Workaround*:
- Set rdns=true in /etc/krb5.conf
- Upgrade to a version of Impala with the fix of IMPALA-7298
3. https://issues.apache.org/jira/browse/KUDU-2198
*Symptoms*: When running with Kerberos enabled, a user may hit the following
error message where <random-string> is some random string which doesn't match
the primary in the Kerberos principal
{noformat}
WARNINGS: TransmitData() to X.X.X.X:27000 failed: Remote error: Not authorized:
{username='<random-string>', principal='impala/redacted'} is not allowed to
access DataStreamService
{noformat}
*Root cause*:
Due to system "auth_to_local" mapping, the principal may be mapped to some
local name.
*Workaround*:
- Start Impala with the flag {{--use_system_auth_to_local=false}}
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