Hive ODBC Connection ETIMEDOUT

I was trying to connect TableAU to Cloudera Hadoop on Windows, every time I got an error saying ETIMEDOUT, no other error message can be found.

To solve this, make sure HiveServer 2 can be selected, and for Authentication Mechanism, choose Username and then type ‘hive‘ in the Username text.

Hive ODBC Connection ETIMEDOUT by @sskaje: https://sskaje.me/2015/03/hive-odbc-etimedout/

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Missing Hive Databases in Cloudera Hue

I created some new databases using hive cli, but those are not listed in Hue. The browser I’m using is Google Chrome.

I logged out and re-login, failed.

I deleted all cached browser files, failed.

I checked cookies, nothing found there.

No API queries are found in the Network tab.

I noticed the ‘Local Storage’ in Chrome’s Developer Tools, many configurations are cached there.
Delete those and re-login.

Missing Hive Databases in Cloudera Hue by @sskaje: https://sskaje.me/2014/11/missing-hive-databases-cloudera-hue/

Manually Upgrade CDH 5.2 in CM 5

I was interrupted again when upgrading CDH.

HDFS

This time, NameNode was not started, I have to bring them up and resume the upgrade progress.
I didn’t save any log about NN’s error, stop all HDFS components and ran ‘Upgrade HDFS Metadata‘, then start HDFS.

YARN

Next, YARN.
I started YARN, and then all other services. Hive went down, then YARN.
I checked CM’s monitor:

I found both instances of ResourceManager were ‘Standby‘.

Here is what I found from /var/log/hadoop-yarn/hadoop-cmf-yarn-RESOURCEMANAGER-hadoop4.xxx.com.log.out

Google helps a lot: http://community.cloudera.com/t5/Cloudera-Manager-Installation/CDH-5-YARN-Resource-Manager-HA-deadlock-in-Kerberos-cluster/td-p/14396

In /opt/cloudera/parcels/CDH/lib/zookeeper/bin/zkCli.sh,
Do

one by one, because zkCli.sh does not have wildcard support.

Hive

I just guessed that hive didn’t work because of YARN, but I was wrong.
I checked all hive related commands executed by CM:

So I stopped Hive, ran Update Hive Metastore NameNodes and Upgrade Hive Metastore Database Schema, none of them worked but with the error message above.
I got more from logs:

The schemaTool reminded me, I manually upgraded hive metastore in Feb: Hive MetaStore Schema Upgrade Failed When Upgrading CDH5.
But this time, dbType should be postgres instead of derby.(Derby is not supported by Impala, that’s why I changed to postgresql embedded in Cloudera Manager.)

I cann’t find the terminal output, but when I ran:

I found a similar output (only first few lines) to the blog post above, saying schemaTool was trying to connect to derby

I re-deploy hive’s client configuration, and checked /etc/hive/conf/hive-site.xml, and compared with /var/run/cloudera-scm-agent/process/4525-hive-HIVEMETASTORE/hive-site.xml,
xml under /etc uses hive metastore’s thrift server and that under CM’s running folder speicified the exact database connection. schemaTool uses the /etc one.
So I replaced /etc one with CM’s, and then redo upgradeSchema:

Same error as I saw in CM’s log, plpgsql does not exist. Fix this by:

You can find password from the xml I mentioned above of file like

If you meet error message saying OWNER_NAME or OWNER_TYPE already exists in table DBS, open /opt/cloudera/parcels/CDH/lib/hive/scripts/metastore/upgrade/postgres/016-HIVE-6386.postgres.sql and comment/delete the two ALTER TABLE lines.

Manually Upgrade CDH 5.2 in CM 5 by @sskaje: https://sskaje.me/2014/10/manually-upgrade-cdh-5-2-cm-5/

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MySQL/Hive/Presto/Impala Transposition

Rows to Columns

Rows to Comma Separated String

MySQL

Use GROUP_CONCAT(). This function also works in Infobright.
Continue reading “MySQL/Hive/Presto/Impala Transposition” »

MySQL/Hive/Presto/Impala Transposition by @sskaje: https://sskaje.me/2014/02/mysql-hive-presto-impala-transposition/

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Hive MetaStore Schema Upgrade Failed When Upgrading CDH5

Manually upgrade:

Continue reading “Hive MetaStore Schema Upgrade Failed When Upgrading CDH5” »

Hive MetaStore Schema Upgrade Failed When Upgrading CDH5 by @sskaje: https://sskaje.me/2014/02/hive-metastore-schema-upgrade-failed-upgrading-cdh5/