How to install Tephra

[jessie.ji...@gmail.com]

Hello there,

I've download and used maven to build tephra on hdp sandbox. It's a single node vm.

According to Getting Started guid, http://tephra.incubator.apache.org/GettingStarted.html

After the build completes, you will have a full binary distribution of Tephra under the tephra-distribution/target/ directory. Take the tephra-<version>.tar.gz file and install it on your systems.

How do I install the gz on the sandbox? Currently when I start ./bin/tephra start, it failed and the log file shows error " cannot find or load main class org.apache.tephra.TransactionServiceMain class.

Thank you for helping!

Jessie

[jessie.ji...@gmail.com]

Hello,

I used tar -xzf to install  the gz file,  and now tephra status shows that it's running

but when I try to follow the 

https://phoenix.apache.org/transactions.html

to create a table with transaction enabled, it errors out as "Thrift error co.cask.tephra.distributed.TransactionServiceClient unable to discover tx service"

In tephra log file an error shows Snapshot directory is not configured.

But I verified that hbase-site.xml has the property configured both in hbase-master and hbase-regserver folder.

I've manually make the directory in /tmp.

And I've restarted hbase service in Ambari.

Still the same error.

What should I do differently?

Thank you very much for helping out!

Jessie

[Andreas Neumann]

Hey Jessie, 

how do you add the Tephra properties to your hbase-site.xml? Are you doing it through Ambari? If not, then Ambari will overwrite your changes every time you restart HBase. Can you check whether these properties are still there after restart?

Best -Andreas

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[jessie.ji...@gmail.com]

Hi Andreas, you were right! I need to change the hbase config via Ambari and restart hbase. 

I changed the file directly and it was overwritten.

I think it's working now. Thank you very much!

Jessie

[Andreas Neumann]

Great to hear. 

By the way, Tephra has become an Apache project and is now maintained there. You are probably working with an older release of Tephra, newer releases will be only at Apache:  http://tephra.apache.org/.

It would also be good to use the Apache mailing list for future discussions: http://tephra.apache.org/mail-lists.html

Best Regards -Andreas

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[jessie.ji...@gmail.com]

Thanks for letting me know. I'll go there 

[Jessie Lin]

Hello all,

I might have missed some steps in deployment since there's still some issues in using transactions.

I added tephra-hbase-compat-1.1....jar to hbase server /lib folder and added the property as well

 <property>
    <name>hbase.coprocessor.region.classes</name>
    <value>org.apache.tephra.hbase.coprocessor.TransactionProcessor</value>
  </property>

But after restart HBase and tephra, phoenix sqlline failed and here's the error(screenshot below)

It complains that it cannot find locations. Does it sound odd? What should I do differently?

thank you for helping!

Jessie

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[Poorna Chandra]

Hi Jessie,

From the error message it looks like the Phoenix driver is not able to connect to the Phoenix Query Service. It looks like there is some issue with the way Phoenix is configured here. Are you able to connect to Phoenix with transactions disabled?

Also note that the Apache email list does not support attaching images. I was able to see the image from the other list. It will be good if you can copy paste the error message from next time onwards.

The error message for reference:

[root@sandbox /usr/hdp/current/phoenix-client/bin/sqlline.py localhost 

Setting property: [incremental, false] 

Setting property: [isolation, TRANSACTION_READ_COMMITTED] 

issuing: !connect jdbc:phoenix:localhost none none org.apache.phoenix.jdbc.PhoenixDriver 

Connecting to jdbc:phoenix:localhost 

SLF41: Class path contains multiple SLF4] bindings. 

SLF41: Found binding in [jar:file:/usr/hdp/2.5.0.0-1245/phoenix/phoenix-4.7.0.2.5.0.0-1245-client.jarl/org/s1f4j/impl/StaticLoggerBinder.class] 

SLF41: Found binding in [jar:file:/usr/hdp/2.5.0.0-1245/hadoop/lib/s1f4j-log4j12-1.7.10.jarl/org/s1f4j/impl/StaticLoggerBinder.class] 

SLF41: See http://www.s1f4j.org/codes.htmlitmultiple_bindings for an explanation. 

17/09/26 18:51:42 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 

17/09/26 18:51:44 WARN shortcircuit.DomainSocketFactory: The short-circuit local reads feature cannot be used because libhadoop cannot be loaded. 

Error: org.apache.hadoop.hbase.client.RetriesExhaustedException. Can't get the locations (state.,code=0) 

java.sql.SQLException: org.apache.hadoop.hbase.client. RetriesExhaustedException: Can't get the locations 

    at org.apache.phoenix.query.ConnectionQueryServicesImp1513.call(ConnectionQueryServicesImpl.java:2590) 

    at org.apache.phoenix.query.ConnectionQueryServicesImp1513.call(ConnectionQueryServicesImpl.java:2327) 

    at org.apache.phoenix.util.PhoenixContextExecutor.call(PhoenixContextExecutor.java:78) 

    at org.apache.phoenix.query.ConnectionQueryServicesImpl.init(ConnectionQueryServicesImpl.java:2327) 

    at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(PhoenixDriver.java:233) 

    at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver.createConnection(PhoenixEmbeddedDriver.java:142) 

    at org.apache.phoenix.jdbc.PhoenixDriver.connect(PhoenixDriver.java:202) 

    at sqlline.DatabaseConnection.connect(DatabaseConnection.java:157) 

    at sqlline.DatabaseConnection.getConnection(DatabaseConnection.java:203) 

    at sqlline.Commands.connect(Commands.java:1064) 

    at sqlline.Commands.connect(Commands.java:996) 

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 

    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 

    at java.lang.reflect.Method.invoke(Method.java:498) 

    at sqlline.ReflectiveCommandHandler.execute(ReflectiveCommandHandler.java:36) 

    at sqlline.SqlLine.dispatch(SqlLine.java:804) 

Thanks,

Poorna.