We had a huge outpouring of wiki love in the Docathon last week :) In the comig weeks we will keep enhancing it to make it really top class.
Ashish ________________________________ From: Prasad Chakka To: [email protected] Sent: Sat Jan 24 15:11:10 2009 Subject: Re: Still can't get metastore working with mysql If you had just checked the wiki here http://wiki.apache.org/hadoop/Hive/AdminManual/MetastoreAdmin#head-baa6450ac33f1324e55dcb0d52344a440f14d75e But was only created last week :) ________________________________ From: Josh Ferguson <[email protected]> Reply-To: <[email protected]> Date: Sat, 24 Jan 2009 15:08:08 -0800 To: <[email protected]> Subject: Re: Still can't get metastore working with mysql That's why I had tried to do initially but the errors I was seeing made me think my configuration was incorrect so I was changing the configuration stuff. This all should be solved in the future with some wiki love. My guess is most people are going to want to use mysql as their metadata store and not derby. Derby is fine developing on your local machine but not much else. Hadoop has a good write up on their wiki about local, psuedo-distributed, and fully distributed setups. Hive could probably benefit from something similar as making the shift from just prototyping on your local machine to a production deployment can be a difficult step. Josh F. On Jan 24, 2009, at 3:00 PM, Prasad Chakka wrote: Well, if you had just used the defaults that are in the hive source and changed just the JDBC params, that is what will happen. The parameters that you are using comes from internal Facebook settings and they are tuned for production. Checking for correctness of schema every time hive connects to metastore is inefficient in production cluster. ________________________________ From: Josh Ferguson <[email protected]> Reply-To: <[email protected]> Date: Sat, 24 Jan 2009 14:55:21 -0800 To: <[email protected]> Subject: Re: Still can't get metastore working with mysql Joydeep Sen Sarma sent them out in the list last month when I was first trying to get this working. I tried to modify them appropriately. This whole "lazy" creation of schemas and tables seems like a really bad way to do things. My configuration shouldn't be different for something that is up and running and something that needs to be created. I should just be able to define my connection parameters and then have a command that migrates my database into the proper state for use. Trying to figure out what magical set of esoteric configuration parameters will tell this black box library to create my schema is really frustrating. Josh F. On Jan 24, 2009, at 2:26 PM, Prasad Chakka wrote: Try setting fixedDataStore to false. BTB, where did you get the initial values from the config you posted? These values are for the store that is already running in production and you don’t expect any changes to the schema. ________________________________ From: Josh Ferguson <[email protected]> Reply-To: <[email protected]> Date: Sat, 24 Jan 2009 14:14:14 -0800 To: <[email protected]> Subject: Re: Still can't get metastore working with mysql That got me a little further, now I'm getting this error: FAILED: Error in metadata: MetaException(message:Got exception: javax.jdo.JDODataStoreException Required table missing : "`SERDES`" in Catalog "" Schema "". JPOX requires this table to perform its persistence operations. Either your MetaData is incorrect, or you need to enable "org.jpox.autoCreateTables") FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask In my hive-default.xml I turned on autoCreateTables and autoCreateSchema and it's still throwing this error back to me? Is there something else I need to do? Josh Ferguson On Jan 24, 2009, at 1:28 PM, Prasad Chakka wrote: Down load the jar from here http://dev.mysql.com/downloads/connector/j/5.1.html ________________________________ From: Prasad Chakka <[email protected]> Reply-To: <[email protected]> Date: Sat, 24 Jan 2009 13:13:35 -0800 To: <[email protected]> Subject: Re: Still can't get metastore working with mysql JPOX/Hive doesn’t yet download the relevant client libraries based on the class name :) Drop mysql client jar in hive/lib. Also try setting org.jpox.autoCreateSchema to true. ________________________________ From: Josh Ferguson <[email protected]> Reply-To: <[email protected]> Date: Sat, 24 Jan 2009 13:06:26 -0800 To: <[email protected]> Subject: Re: Still can't get metastore working with mysql So I'm not really sure what the state of the database should be, I have a database called hive and the user has permissions to access it. I'm not sure which mysql client libraries need to be in the classpath, I assumed it was all rolled into the jpox stuff. Here is the complete error: 09/01/24 16:02:16 DEBUG exec.DDLTask: org.apache.hadoop.hive.ql.metadata.HiveException: MetaException(message:Got exception: javax.jdo.JDOFatalInternalException Error creating transactional connection factory) at org.apache.hadoop.hive.ql.metadata.Hive.getTablesByPattern(Hive.java:446) at org.apache.hadoop.hive.ql.metadata.Hive.getAllTables(Hive.java:433) at org.apache.hadoop.hive.ql.exec.DDLTask.showTables(DDLTask.java:330) at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:127) at org.apache.hadoop.hive.ql.Driver.run(Driver.java:212) at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:174) at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:207) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:268) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.hadoop.util.RunJar.main(RunJar.java:165) at org.apache.hadoop.mapred.JobShell.run(JobShell.java:54) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) at org.apache.hadoop.mapred.JobShell.main(JobShell.java:68) Caused by: MetaException(message:Got exception: javax.jdo.JDOFatalInternalException Error creating transactional connection factory) at org.apache.hadoop.hive.metastore.MetaStoreUtils.logAndThrowMetaException(MetaStoreUtils.java:543) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.getTables(HiveMetaStoreClient.java:451) at org.apache.hadoop.hive.ql.metadata.Hive.getTablesByPattern(Hive.java:444) ... 16 more On Jan 24, 2009, at 12:58 PM, Prasad Chakka wrote: There could be many reasons for it. Could you post the stacktrace for the JDOFatal? Some reasons could be That mysql client libs are in the classpath. That there is a database called ‘hive’ in mysql That there is schema already created in that database (otherwise set autoCreateSchema to true) etc... Check documentation for the many jpox options ________________________________ From: Josh Ferguson <[email protected]> Reply-To: <[email protected]> Date: Sat, 24 Jan 2009 12:48:27 -0800 To: <[email protected]> Subject: Still can't get metastore working with mysql Ok I still can't manage to get the metastore working with mysql after all this time trying. The error is: FAILED: Error in metadata: MetaException(message:Got exception: javax.jdo.JDOFatalInternalException Error creating transactional connection factory) FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask The relevant config is: <!-- Hadoop Setup --> <property> <name>hadoop.bin.path</name> <value>/usr/local/hadoop/bin/hadoop</value> <description>Path to hadoop binary. Assumes that by default we are executing from hive</description> </property> <property> <name>hadoop.config.dir</name> <value>/usr/local/hadoop/conf</value> <description>Path to hadoop configuration. Again assumes that by default we are executing from hive/</description> </property> <!-- Hive Execution Parameters --> <property> <name>hive.exec.scratchdir</name> <value>/tmp/hive-${user.name}</value> <description>Scratch space for Hive jobs</description> </property> <property> <name>javax.jdo.option.ConnectionURL</name> <value>jdbc:mysql://localhost/hive</value> </property> <property> <name>javax.jdo.option.ConnectionDriverName</name> <value>com.mysql.jdbc.Driver</value> </property> <property> <name>javax.jdo.option.ConnectionUserName</name> <value>******</value> </property> <property> <name>javax.jdo.option.ConnectionPassword</name> <value>******</value> </property> <property> <name>org.jpox.autoCreateSchema</name> <value>false</value> </property> <property> <name>org.jpox.fixedDatastore</name> <value>true</value> </property> <property> <name>hive.metastore.usefilestore</name> <value>false</value> </property> <property> <name>hive.metastore.checkForDefaultDb</name> <value>false</value> </property> <property> <name>hive.metastore.rawstore.impl</name> <value>org.apache.hadoop.hive.metastore.ObjectStore</value> <description>Name of the class that implements org.apache.hadoop.hive.metastore.rawstore interface. This class is used to store and retrieval of raw metadata objects such as table, database</description> </property> <property> <name>hive.metastore.local</name> <value>true</value> <description>controls whether to connect to remove metastore server or open a new metastore server in Hive Client JVM</description> </property>
