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https://issues.apache.org/jira/browse/CHUKWA-734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14330463#comment-14330463
]
Eric Yang commented on CHUKWA-734:
----------------------------------
I got an error for running TestHBaseWriter unit test:
-------------------------------------------------------------------------------
Test set: org.apache.hadoop.chukwa.datacollection.writer.TestHBaseWriter
-------------------------------------------------------------------------------
Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 0.707 sec <<<
FAILURE!
testWriters(org.apache.hadoop.chukwa.datacollection.writer.TestHBaseWriter)
Time elapsed: 0.582 sec <<< ERROR!
java.lang.IncompatibleClassChangeError: Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at
org.apache.hadoop.hbase.mapreduce.MapreduceTestingShim.<clinit>(MapreduceTestingShim.java:45)
at
org.apache.hadoop.hbase.HBaseTestingUtility.createDirsAndSetProperties(HBaseTestingUtility.java:606)
at
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniDFSCluster(HBaseTestingUtility.java:535)
at
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:880)
at
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:805)
at
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:776)
at
org.apache.hadoop.hbase.HBaseTestingUtility.startMiniCluster(HBaseTestingUtility.java:745)
at
org.apache.hadoop.chukwa.datacollection.writer.TestHBaseWriter.setUp(TestHBaseWriter.java:67)
at junit.framework.TestCase.runBare(TestCase.java:132)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:243)
at junit.framework.TestSuite.run(TestSuite.java:238)
at
org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
at
org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:53)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:123)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:164)
at
org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:110)
at
org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:175)
at
org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcessWhenForked(SurefireStarter.java:81)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:68)
This exception happens when using Hadoop 1.2.1 + HBase 0.98.8 + Hadoop-compat1.
Does Gora support Hadoop1?
We probably need to setup another profile for enabling Hadoop 1 vs Hadoop 2.
For table schema design and row key design, maybe we can use something like
this:
Row Key: [Invert Date]:[Data Type]:[Primary Key]
Column Family: log
Column Name: [Sequence ID]
Timestamp: [log entry timestamp]
Example:
Row Key: 2132013102:TT:host1.example.com
Column Family: log
Column Name: 1230
Cell Value: 2013-01-23 12:01:30 INFO This is a log entry.
Timestamp: 1358942490
The inverted date allow the table to be partitioned by hour or day of the month
or month more easily.
The usage of column name for consecutive sequence to allow fast retrieval in a
linear scan. This format is typically good for retrieve a hour worth of logs
fast for a node. Hence, if we are doing batch scanning of the table in a
rolling window via map reduce job at every hour interval, we get a even spread
the work load to multiple map reduce tasks.
Can Gora map sequence ID value to column name in HBase?
> Gora Storage System for Chuckwa Logs
> ------------------------------------
>
> Key: CHUKWA-734
> URL: https://issues.apache.org/jira/browse/CHUKWA-734
> Project: Chukwa
> Issue Type: New Feature
> Components: Data Collection
> Affects Versions: 0.6.0
> Reporter: Lewis John McGibbney
> Fix For: 0.6.0
>
> Attachments: CHUKWA-734.patch
>
> Original Estimate: 5h
> Remaining Estimate: 5h
>
> I would like to build a Gora-backed log-to-datastore module for Chuckwa. I am
> going to work on this today.
> Gora is an in-memory data modeling and storage abstraction
> http://gora.apache.org
> Gora powers the Apache Nutch 2.X software which generates a bunch of log
> data. Having a Chuckwa monitoring tool for Nutch would be grand.
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