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From "Mingliang Liu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-13105) Support timeouts in LDAP queries in LdapGroupsMapping.
Date Sat, 07 May 2016 10:14:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-13105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Mingliang Liu updated HADOOP-13105:
    Attachment: HADOOP-13105.000.patch

Hi [~cnauroth], thanks for reporting this.

# In the {{LdapGroupsMapping}}, we are also missing the {{com.sun.jndi.ldap.connect.timeout}}
property for the env. I suppose this is orthogonal to the read timeouts. Should we address
this as well?
# I had a look at the JNDI API documentation you kindly posted. I'm not sure I understand
it correctly or the documentation is stale, but I was not able to reproduce the timed out
exception using the [ReadTimeoutTest.java|https://docs.oracle.com/javase/tutorial/displayCode.html?code=https://docs.oracle.com/javase/tutorial/jndi/newstuff/examples/ReadTimeoutTest.java].
If we only set the {{com.sun.jndi.ldap.read.timeout}} env, the {{new InitialDirContext(env)}}
will be stuck at connection phase and the read (query) operation will never be really issued.
The test is running forever. However, if I set the {{com.sun.jndi.ldap.connect.timeout}},
the {{LDAP response read timed out}} naming exception will be thrown as expected.
# That's said, to test the {{com.sun.jndi.ldap.read.timeout}} feature is not as easy as to
test the connect timeout. I'm wondering if the mock/spy will really help us here.

See the v0 patch attached. I can make the property values configurable.

> Support timeouts in LDAP queries in LdapGroupsMapping.
> ------------------------------------------------------
>                 Key: HADOOP-13105
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13105
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: security
>            Reporter: Chris Nauroth
>            Assignee: Mingliang Liu
>         Attachments: HADOOP-13105.000.patch
> {{LdapGroupsMapping}} currently does not set timeouts on the LDAP queries.  This can
create a risk of a very long/infinite wait on a connection.

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