topic Re: Connection between SAS 9.4 and Cloudera Hadoop thru proc hadoop and libname - facing errors in SAS Programming

Connection between SAS 9.4 and Cloudera Hadoop thru proc hadoop and libname - facing errors

Sudharsan — Thu, 26 May 2016 11:09:25 GMT

Hi, I'm trying to connect Windows SAS 9.4 to Cloudera hadoop 5.0.1-1-vmware(installed to Oracle VM VirtualBox). As given in SAS forums, I have copied the list of configuration files and jar files to the local Windows directory, and assigned their directory path to SAS_HADOOP_CONFIG_PATH and SAS_HADOOP_JAR_PATH respectively. Please find attached screen captures for the list of Config files and Jar files I got from Cloudera system. Now when I run Proc Hadoop and libname statements, I'm getting errors related to JAVA. Can anyone help me in fixing the issue. Please find below log statements with code and errors. /**Connecting with Proc Hadoop**/ 25 options set=SAS_HADOOP_CONFIG_PATH="D:\hadoop\conf"; 26 options set=SAS_HADOOP_JAR_PATH="D:\hadoop\jarlib"; 27 /* create authdomain in SAS Metadata named "HADOOP" * 28 * copy file from my local file system to HDFS * 29 * HDFS location is /user/sas * 30 *****************************************************/ 31 proc hadoop username='cloudera' password=XXXXXXXXXX verbose; 32 hdfs mkdir='/home/cloudera/Desktop/newdir'; 33 hdfs copytolocal='/home/cloudera/Desktop/samplenew.txt' 34 out='D:\hadoop\sampletest.txt' ; ERROR: java.io.FileNotFoundException: File /home/cloudera/Desktop/samplenew.txt does not exist ERROR: at org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java: 511) ERROR: at org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.jav a:724) ERROR: at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:501) ERROR: at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:397) ERROR: at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:337) ERROR: at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:289) ERROR: at com.dataflux.hadoop.DFHDFS$10.run(DFHDFS.java:322) ERROR: at java.security.AccessController.doPrivileged(Native Method) ERROR: at javax.security.auth.Subject.doAs(Subject.java:415) ERROR: at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1554) ERROR: at com.dataflux.hadoop.DFHDFS.copyToLocal(DFHDFS.java:313) 35 run; NOTE: The SAS System stopped processing this step because of errors. NOTE: PROCEDURE HADOOP used (Total process time): real time 0.07 seconds cpu time 0.01 seconds /**Connecting with lib statement**/ 36 libname hivelib hadoop server="10.237.22.44" port=22 user="cloudera" password=XXXXXXXXXX 36 ! subprotocol=hive 37 cfg="D:\hadoop\conf\core-site.xml"; ERROR: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space ERROR: Unable to connect to the Hive server. ERROR: Error trying to establish connection. ERROR: Error in the LIBNAME statement.

Re: Connection between SAS 9.4 and Cloudera Hadoop thru proc hadoop and libname - facing errors

alnisley — Fri, 27 May 2016 18:46:14 GMT

Hey - In response to the Proc Hadoop question:

The issue here is that the file that you are attempting to copy is not being found. This is the relevant error line from the java trace back: ERROR: java.io.FileNotFoundException: File /home/cloudera/Desktop/samplenew.txt does not exist

Based on the path that you are trying to copy, I'm guessing that the file is located on the server's local file system... When you use Proc Hadoop, it only connects to the Hadoop File System (HDFS) and therefore can only access files that are within HDFS.

So a couple suggestions, if you want to use that file, copy it to hdfs using the VM command line and the "hadoop fs -put" or "hadoop fs -copyFromLocal" (it may be 'hdfs dfs' instead of 'hadoop fs' depending on your version of Hadoop). Otherwise, I'd suggest you creating a local file on your Windows box and trying a proc hadoop copyfromlocal to the directory that you create.

Based on your code comment, to put a file on HDFS you'd want to use copyfromlocal. Copyfromlocal will copy a file from your Windows local file system to HDFS on the cloudera VM, while copytolocal will copy a file from HDFS on the cloudera VM to your Windows local file system

Below I have revised your proc hadoop code and included an example of both types of copy statements. The code below would in theory create '/user/sas/newdir' on your Cloudera VM's HDFS, it would then copy a file from your windows box to the Cloudera VM's HDFS, and finally copy it back to your Windows local file system. You would have to correct the X'ed password, and ensure that 'D:\hadoop\sample.txt' existed before running the code.

options set=SAS_HADOOP_CONFIG_PATH="D:\hadoop\conf";

options set=SAS_HADOOP_JAR_PATH="D:\hadoop\jarlib";

proc hadoop username='cloudera' password=XXXXXXXXXX verbose;

hdfs mkdir='/user/sas/newdir';

hdfs copyfromlocal='D:\hadoop\sample.txt' out='/user/sas/samplenew.txt' ;

hdfs copytolocal='/user/sas/samplenew.txt' out='D:\hadoop\sampletest.txt' ;

run;

I do not know much about libname statements, and will not be able to address those errors - but I do hope this gets you running with Proc Hadoop.

Re: Connection between SAS 9.4 and Cloudera Hadoop thru proc hadoop and libname - facing errors

JanVanHeyden — Mon, 30 May 2016 11:22:25 GMT

Hi,

I face the same error no matter what statement I'm using:

proc sql;
    connect to hadoop
    (server="myserver" subprotocol=hive2 user=&u_name. pwd=&u_pass.);
    select * from connection to hadoop
       (select var1, count(*) as cnt
       from default.mytable
       group by var1
       );
    disconnect from hadoop;
quit;

libname mylib hadoop subprotocol=hive2 port=10000 host="myhost" schema=default user=&u_name. pw=&u_pass.;

proc freq data=default.mytable;
tables var1;
run;

When I´m trying to access 'bigger' tables using those statements on hadoop via SAS STUDIO I get the same Error:

ERROR: Prepare error: Error while processing statement: FAILED: Execution Error, return code 1 from
org.apache.hadoop.hive.ql.exec.mr.MapRedTask

It seems to have sth. to do with the size. If I e.g. do a data step to create a sas table in work out of hive it results in the same error. If i then split the data set using the (obs=100000)-statement it works just fine.

Any update or work arround on this would be really helpful. It would be great to manipulate data via SAS directly on hive, no matter how big the data is.

Re: Connection between SAS 9.4 and Cloudera Hadoop thru proc hadoop and libname - facing errors

Go — Tue, 09 Aug 2016 15:35:09 GMT

Is this fixed ? I have similar situation

libname hdp hadoop server=dqas1100a port=10000 schema=default subprotocol=hive2;

ERROR: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: sun.util.calendar.ZoneInfoFile (initialization

failure)

ERROR: Error trying to establish connection.

ERROR: Error in the LIBNAME statement.

Re: Connection between SAS 9.4 and Cloudera Hadoop thru proc hadoop and libname - facing errors

JanVanHeyden — Tue, 09 Aug 2016 15:51:38 GMT

Hi,

for us the following solution worked.

Add to your libname statement user and password from an account that has the rights to write data to your clusters /user/<username> folder. In our case that was the HUE Username and Password. Our HUE users had a directory within /user on the cluster and the rights to write data to it. So your statement should look sth. like:

/*--- your statement WITH PW ---*/
libname hdp hadoop subprotocol=hive2
server=dqas1100a 
port=10000 
schema=default
user = <yourusername>
pw = <yourpassword>
;

/* --- our statement that works now, for comparison ---*/
libname myhive 	hadoop subprotocol=hive2 
				port=10000 
				host= "<our_hostname>" 
				schema= "default"
				user = <my_HUE_Username>
				pw = <my_HUE_Password>
				;

Hope that works!

Re: Connection between SAS 9.4 and Cloudera Hadoop thru proc hadoop and libname - facing errors

Go — Thu, 11 Aug 2016 14:18:23 GMT

We have kerberos enabled.. So it doesn't fix , thanks for sharing your thoughts though

ERROR: The Hive Kerberos principal string is present in the hive-site.xml file in the SAS_HADOOP_JAR_PATH. The USER= and PASSWORD=
options cannot not be specified when the Hive Kerberos principal string is present.
ERROR: Error in the LIBNAME statement.