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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-6173) Document the configuration of deploying MR over distributed cache with enabling wired encryption at the same time
Date Tue, 25 Nov 2014 15:34:12 GMT
Junping Du created MAPREDUCE-6173:
-------------------------------------

             Summary: Document the configuration of deploying MR over distributed cache with
enabling wired encryption at the same time
                 Key: MAPREDUCE-6173
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6173
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: distributed-cache, documentation
    Affects Versions: 2.6.0
            Reporter: Junping Du
            Assignee: Junping Du


Use the current documented configuration (specified in http://hadoop.apache.org/docs/stable/hadoop-mapreduce-client/hadoop-mapreduce-client-core/DistributedCacheDeploy.html)
to work with the cluster enabling shuffle encryption (http://hadoop.apache.org/docs/stable/hadoop-mapreduce-client/hadoop-mapreduce-client-core/EncryptedShuffle.html)
will cause the job failed with exception below:
{noformat}
2014-10-10 02:17:16,600 WARN [fetcher#1] org.apache.hadoop.mapreduce.task.reduce.Fetcher:
Failed to connect to tassapol-centos5nano1-3.cs1cloud.internal:13562 with 1 map outputs
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find
valid certification path to requested target
	at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1731)
	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:241)
	at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:235)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1206)
	at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:136)
	at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)
	at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Handshaker.java:529)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:925)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1170)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1197)
	at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1181)
	at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:434)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.setNewClient(AbstractDelegateHttpsURLConnection.java:81)
	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.setNewClient(AbstractDelegateHttpsURLConnection.java:61)
	at sun.net.www.protocol.http.HttpURLConnection.writeRequests(HttpURLConnection.java:584)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1193)
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:379)
	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(HttpsURLConnectionImpl.java:318)
	at org.apache.hadoop.mapreduce.task.reduce.Fetcher.verifyConnection(Fetcher.java:427)
{noformat}
This is due to ssl-client.xml is not included in MR tar ball when we deploy it over distributed
cache. Putting the ssl-client.xml on CLASSPATH of MR job can resolve the problem and we should
document it.



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