cassandra中的批量加载出错

Question

早上好，

我正在尝试使用批量加载来实现大规模数据转储cassandra示例(http://www.datastax.com/dev/blog/bulk-loading)作为向导。

在示例中，使用脚本解析依赖关系(http://www.datastax.com/wp-content/uploads/2011/08/DataImport)但是我发现cassandra库要覆盖的依赖项不在这里列出的目录中，因为我使用的是带有cassandra 2.0的dse版本。然后尝试覆盖这样的依赖关系得到以下脚本。

#!/bin/sh
# paths to the cassandra source tree, cassandra jar and java
CASSANDRA_HOME="/usr/share/dse/cassandra"
# CASSANDRA_JAR="./apache-cassandra-2.0.10.jar"
JAVA=`which java`
# Java classpath. Must include:
#   - directory of DataImportExample
#   - directory with cassandra/log4j config files
#   - cassandra jar
#   - cassandra depencies jar
CLASSPATH=".:/usr/share/dse/dse.jar:./slf4j-1.7.7/slf4-nop-1.7.7.jar:./slf4j-1.7.7/slf4j-simple-1.7.7.jar:/etc/dse/cassandra"
for jar in $CASSANDRA_HOME/lib/*.jar; do
    CLASSPATH=$CLASSPATH:$jar
done
$JAVA -ea -cp $CLASSPATH -Xmx256M 
        -Dlog4j.configuration=log4j-tools.properties 
        CassandraDataBulk "$@"

• 对CASSANDRA_JAR进行了评论，我使用了位于文件夹"/usr/share/dse/CASSANDRA/lib"中的"CASSANDRA-all-2.0.8.39.JAR"，并且已经包含在内。

• 我在1.7.7版本中下载slf4j来解决依赖关系。

由于cassandra版本的差异，我也不得不习惯SSTableSimpleUnsortedWriter构建器。

IPartitioner partitioner = new RandomPartitioner();
        SSTableSimpleUnsortedWriter sourcesWriter = new SSTableSimpleUnsortedWriter(
                directory,
                partitioner,
                keyspace,
                table,
                AsciiType.instance, 
                null, 
                64
        );

今天的问题似乎仍然存在依赖关系。在下面，我得到的跟踪错误。

有一个依赖项，但似乎是"org.apache.commons.configuration.ConfigurationRuntimeException"，真正的问题可能是另一个，可能有一个糟糕的配置"cassandra.yaml"？

谢谢，问候！

[dmdb@vm-dmdb01 ~]$ ./init_env.sh export.csv 
[main] ERROR org.apache.cassandra.cql3.QueryProcessor - Unable to initialize MemoryMeter (jamm not specified as javaagent).  This means Cassandra will be unable to measure object sizes accurately and may consequently OOM.
[main] INFO org.apache.cassandra.config.YamlConfigurationLoader - Loading settings from file:/etc/dse/cassandra/cassandra.yaml
[main] INFO org.apache.cassandra.config.DatabaseDescriptor - Data files directories: [/data01, /data02]
[main] INFO org.apache.cassandra.config.DatabaseDescriptor - Commit log directory: /datatmp/commitlog
[main] INFO org.apache.cassandra.config.DatabaseDescriptor - DiskAccessMode 'auto' determined to be mmap, indexAccessMode is mmap
[main] INFO org.apache.cassandra.config.DatabaseDescriptor - disk_failure_policy is stop
[main] INFO org.apache.cassandra.config.DatabaseDescriptor - commit_failure_policy is stop
[main] INFO org.apache.cassandra.config.DatabaseDescriptor - Global memtable threshold is enabled at 61MB
[main] INFO com.datastax.bdp.snitch.Workload - Setting my workload to Cassandra
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/configuration/ConfigurationRuntimeException
    at com.datastax.bdp.config.ConfigUtil.defaultValue(ConfigUtil.java:18)
    at com.datastax.bdp.config.DseConfig.<clinit>(DseConfig.java:51)
    at com.datastax.bdp.snitch.DseDelegateSnitch.<init>(DseDelegateSnitch.java:42)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at java.lang.Class.newInstance(Class.java:374)
    at org.apache.cassandra.utils.FBUtilities.construct(FBUtilities.java:488)
    at org.apache.cassandra.config.DatabaseDescriptor.createEndpointSnitch(DatabaseDescriptor.java:508)
    at org.apache.cassandra.config.DatabaseDescriptor.applyConfig(DatabaseDescriptor.java:341)
    at org.apache.cassandra.config.DatabaseDescriptor.<clinit>(DatabaseDescriptor.java:111)
    at org.apache.cassandra.io.sstable.AbstractSSTableSimpleWriter.<init>(AbstractSSTableSimpleWriter.java:50)
    at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter.<init>(SSTableSimpleUnsortedWriter.java:96)
    at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter.<init>(SSTableSimpleUnsortedWriter.java:80)
    at org.apache.cassandra.io.sstable.SSTableSimpleUnsortedWriter.<init>(SSTableSimpleUnsortedWriter.java:91)
    at CassandraDataBulk.main(CassandraDataBulk.java:35)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.configuration.ConfigurationRuntimeException
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 17 more

Answer 1

您的java调用中缺少一个"javaagent"参数。添加以下内容：

-javaagent:$CASSANDRA_HOME/lib/jamm-0.2.5.jar

你的最后一个电话应该是：

$JAVA -ea -cp $CLASSPATH -Xmx256M 
       -Dlog4j.configuration=log4j-tools.properties 
       -javaagent:$CASSANDRA_HOME/lib/jamm-0.2.5.jar
       CassandraDataBulk "$@"

注意：根据需要将路径调整为jamm.jar

参考

至于运行时配置错误，请下载apachecommons的lang库，并将其包含在类路径中。

在此处下载

如果在实现修复后收到新的异常，请下载google-common.jar和guava-16.0.1.jar，并将它们也包含在类路径中。到目前为止，这些都是我自己的散装装载机所需要的JAR。