elasticsearch-hadoop是一个深度集成Hadoop和ElasticSearch的项目，也是ES官方来维护的一个子项目，通过实现Hadoop和ES之间的输入输出，可以在Hadoop里面对ES集群的数据进行读取和写入，充分发挥Map-Reduce并行处理的优势，为Hadoop数据带来实时搜索的可能。
项目网址：http://www.elasticsearch.org/overview/hadoop/
运行环境：
CDH4、ElasticSearch0.90.2
http://www.cloudera.com/content/cloudera-content/cloudera-docs/CDH4/latest/CDH4-Quick-Start/cdh4qs_topic_3_3.html
https://github.com/medcl/elasticsearch-rtf
Hive和ES的互操作：
#安装，HIVE里面添加ElasticSearch-Hadoop的JAR路径
#下载hadoop-es jar包,https://download.elasticsearch.org/hadoop/hadoop-latest.zip
#Hive加载的JAR路径为本地路径
[medcl@node-1 ~]$ ls elasticsearch-hadoop-1.3.0.M1.jar [medcl@node-1 ~]$ pwd /home/medcl [medcl@node-1 ~]$ hive -hiveconf hive.aux.jars.path=/home/medcl/elasticsearch-hadoop-1.3.0.M1.jar Logging initialized using configuration in file:/etc/hive/conf.dist/hive-log4j.properties Hive history file=/tmp/medcl/hive_job_log_94db3616-e210-4aab-b07b-6fb159e217ec_1758848920.txt
#ElasticSearch集群名为"elasticsearch",和Hadoop在一个机器上
#Hive里面创建一个Table(user)，并使用Hadoop-ElasticSearch关联一个索引（/index/user）,2个字段，id和name
CREATE EXTERNAL TABLE user (id INT, name STRING,site STRING) STORED BY 'org.elasticsearch.hadoop.hive.ESStorageHandler' TBLPROPERTIES('es.resource' = 'index/user/', 'es.index.auto.create' = 'true')
在medcl用下操作：
CREATE EXTERNAL TABLE user (id INT, name STRING) STORED BY 'org.elasticsearch.hadoop.hive.ESStorageHandler' TBLPROPERTIES('es.resource' = '/index/user/', 'es.index.auto.create' = 'true');
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask hive> CREATE EXTERNAL TABLE user (id INT, name STRING) > STORED BY 'org.elasticsearch.hadoop.hive.ESStorageHandler' > TBLPROPERTIES('es.resource' = 'medcl/', > 'es.index.auto.create' = 'false'); FAILED: Error in metadata: MetaException(message:Got exception: org.apache.hadoop.security.AccessControlException Permission denied: user=medcl, access=WRITE, inode="/user":hdfs:supergroup:drwxr-xr-x
#擦，看下权限 [medcl@node-1 ~]$ hadoop fs -lsr / lsr: DEPRECATED: Please use 'ls -R' instead. drwxrwxrwt - hdfs supergroup 0 2013-12-16 22:19 /tmp drwxr-xr-x - hdfs supergroup 0 2013-12-16 22:25 /user drwxr-xr-x - medcl supergroup 0 2013-12-17 00:30 /user/medcl drwxr-xr-x - medcl supergroup 0 2013-12-16 22:32 /user/medcl/input -rw-r--r-- 1 medcl supergroup 2801897 2013-12-16 22:32 /user/medcl/input/file1.txt drwxr-xr-x - medcl supergroup 0 2013-12-17 00:30 /user/medcl/lib -rw-r--r-- 1 medcl supergroup 160414 2013-12-17 00:30 /user/medcl/lib/elasticsearch-hadoop-1.3.0.M1.jar drwxr-xr-x - hdfs supergroup 0 2013-12-16 22:20 /var drwxr-xr-x - hdfs supergroup 0 2013-12-16 22:20 /var/lib #原来user目录权限是hdfs，ok，切换hdfs，jar也换个hdfs用户可以访问到的位置，就/tmp吧 [root@node-1 medcl]# cp elasticsearch-hadoop-1.3.0.M1.jar /tmp/ [root@node-1 medcl]# ^C [root@node-1 medcl]# sudo -u hdfs hive -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar Logging initialized using configuration in file:/etc/hive/conf.dist/hive-log4j.properties Hive history file=/tmp/hdfs/hive_job_log_bdad4d7a-f929-43d7-a56e-e026fdd7e3b4_1219802521.txt hive> CREATE EXTERNAL TABLE user (id INT, name STRING) > STORED BY 'org.elasticsearch.hadoop.hive.ESStorageHandler' > TBLPROPERTIES('es.resource' = '/index/user/', > 'es.index.auto.create' = 'false'); 2013-12-16 17:09:29.560 GMT Thread[main,5,main] java.io.FileNotFoundException: derby.log (Permission denied) ---------------------------------------------------------------- 2013-12-16 17:09:29.877 GMT: Booting Derby version The Apache Software Foundation - Apache Derby - 10.4.2.0 - (689064): instance a816c00e-0142-fc62-4b5c-000000cec758 on database directory /var/lib/hive/metastore/metastore_db in READ ONLY mode Database Class Loader started - derby.database.classpath='' FAILED: Error in metadata: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.metastore.HiveMetaStoreClient FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask #ok，干掉lock [root@node-1 ~]# ls /var/lib/hive/metastore/metastore_db dbex.lck db.lck log seg0 service.properties tmp [root@node-1 ~]# rm /var/lib/hive/metastore/metastore_db/dbex.lck rm: remove regular file `/var/lib/hive/metastore/metastore_db/dbex.lck'? y [root@node-1 ~]# rm /var/lib/hive/metastore/metastore_db/db.lck rm: remove regular file `/var/lib/hive/metastore/metastore_db/db.lck'? y #另外忘记关另外一个hive实例了，难怪呢。 [root@node-1 tmp]# ps -aux|grep hive Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ root 10855 0.0 0.1 148024 2064 pts/0 S+ 01:09 0:00 sudo -u hdfs hive -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar hdfs 10856 1.8 5.7 858344 109892 pts/0 Sl+ 01:09 0:06 /usr/lib/jvm/java-openjdk/bin/java -Xmx256m -Dhadoop.log.dir=/usr/lib/hadoop/logs -Dhadoop.log.file=hadoop.log -Dhadoop.home.dir=/usr/lib/hadoop -Dhadoop.id.str= -Dhadoop.root.logger=INFO,console -Djava.library.path=/usr/lib/hadoop/lib/native -Dhadoop.policy.file=hadoop-policy.xml -Djava.net.preferIPv4Stack=true -Dhadoop.security.logger=INFO,NullAppender org.apache.hadoop.util.RunJar /usr/lib/hive/lib/hive-cli-0.10.0-cdh4.5.0.jar org.apache.hadoop.hive.cli.CliDriver -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar
#权限问题 [root@node-1 tmp]# ll /var/lib/hive/metastore/metastore_db/ total 16 drwxrwxr-x 2 medcl medcl 4096 Dec 17 00:56 log drwxrwxr-x 2 medcl medcl 4096 Dec 17 00:56 seg0 -rw-rw-r-- 1 medcl medcl 860 Dec 17 00:56 service.properties drwxrwxr-x 2 medcl medcl 4096 Dec 17 01:01 tmp [root@node-1 tmp]# sudo -u hdfs hive -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar^C [root@node-1 tmp]# chmod 777 /var/lib/hive/metastore/metastore_db/ -R [root@node-1 tmp]# sudo -u hdfs hive -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar Logging initialized using configuration in file:/etc/hive/conf.dist/hive-log4j.properties Hive history file=/tmp/hdfs/hive_job_log_d5749cb0-fde0-4da2-9094-c85cf4673885_252074310.txt hive> show tables; OK Time taken: 6.934 seconds hive> CREATE EXTERNAL TABLE user (id INT, name STRING) > STORED BY 'org.elasticsearch.hadoop.hive.ESStorageHandler' > TBLPROPERTIES('es.resource' = '/index/user/', > 'es.index.auto.create' = 'true'); OK Time taken: 1.115 seconds #ok，创建成功了 hive> show tables; OK user Time taken: 0.15 seconds hive> #权限问题是Hive默认仓库路径造成的，生疏了 [root@node-1 tmp]# sudo su hdfs bash-4.1$ hadoop fs -lsr / lsr: DEPRECATED: Please use 'ls -R' instead. drwxrwxrwt - hdfs supergroup 0 2013-12-16 22:19 /tmp drwxr-xr-x - hdfs supergroup 0 2013-12-17 01:20 /user drwxr-xr-x - hdfs supergroup 0 2013-12-17 01:20 /user/hive drwxr-xr-x - hdfs supergroup 0 2013-12-17 01:20 /user/hive/warehouse drwxr-xr-x - hdfs supergroup 0 2013-12-17 01:20 /user/hive/warehouse/user #好了，开始往HIVE里面倒数据了，先来几行数据 [root@node-1 tmp]# cat files1.txt 1,medcl 2,lcdem 3,tom 4,jack #传上去 [root@node-1 tmp]# sudo su hdfs bash-4.1$ hadoop fs -put files1.txt /tmp/ bash-4.1$ hadoop fs -ls /tmp/ Found 1 items -rw-r--r-- 1 hdfs supergroup 29 2013-12-17 01:28 /tmp/files1.txt #加载到Hive里面 hive -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar #LOAD DATA LOCAL INPATH '/tmp/files1.txt' OVERWRITE INTO TABLE user_source; #CREATE EXTERNAL TABLE user_source (id INT, name STRING); #不是原始Hive表，还不能直接LOAD bash-4.1$ hive -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar Logging initialized using configuration in file:/etc/hive/conf.dist/hive-log4j.properties Hive history file=/tmp/hdfs/hive_job_log_a9516f87-6e2d-44db-9d38-18eed77d9dec_1583221137.txt hive> LOAD DATA LOCAL INPATH '/tmp/files1.txt' OVERWRITE INTO TABLE user; FAILED: SemanticException [Error 10101]: A non-native table cannot be used as target for LOAD hive> CREATE EXTERNAL TABLE user_source (id INT, name STRING); OK Time taken: 1.104 seconds hive> LOAD DATA LOCAL INPATH '/tmp/files1.txt' OVERWRITE INTO TABLE user_source; Copying data from file:/tmp/files1.txt Copying file: file:/tmp/files1.txt Loading data to table default.user_source Table default.user_source stats: [num_partitions: 0, num_files: 1, num_rows: 0, total_size: 29, raw_data_size: 0] OK Time taken: 0.911 seconds hive> show tables; OK user user_source Time taken: 0.226 seconds #下面这个错误是因为es-hadoop的jar文件没有传到HDFS上面，看来本地和HDFS都要上传，并且路径要一致 hive> select id,name from user_source; Total MapReduce jobs = 1 Launching Job 1 out of 1 Number of reduce tasks is set to 0 since there's no reduce operator java.io.FileNotFoundException: File does not exist: /tmp/elasticsearch-hadoop-1.3.0.M1.jar at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:824) at org.apache.hadoop.filecache.DistributedCache.getFileStatus(DistributedCache.java:185) at org.apache.hadoop.filecache.TrackerDistributedCacheManager.determineTimestamps(TrackerDistributedCacheManager.java:821) at org.apache.hadoop.filecache.TrackerDistributedCacheManager.determineTimestampsAndCacheVisibilities(TrackerDistributedCacheManager.java:778) at org.apache.hadoop.mapred.JobClient.copyAndConfigureFiles(JobClient.java:855) at org.apache.hadoop.mapred.JobClient.copyAndConfigureFiles(JobClient.java:746) at org.apache.hadoop.mapred.JobClient.access$400(JobClient.java:177) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:963) at org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:948) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1408) at org.apache.hadoop.mapred.JobClient.submitJobInternal(JobClient.java:948) at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:922) at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:448) at org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:138) at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:138) at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:66) at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1383) at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1169) at org.apache.hadoop.hive.ql.Driver.run(Driver.java:982) at org.apache.hadoop.hive.ql.Driver.run(Driver.java:902) at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:259) at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:216) at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:412) at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:759) at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:613) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at org.apache.hadoop.util.RunJar.main(RunJar.java:208) Job Submission failed with exception 'java.io.FileNotFoundException(File does not exist: /tmp/elasticsearch-hadoop-1.3.0.M1.jar)' FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MapRedTask #ok，再看看 bash-4.1$ hadoop fs -put elasticsearch-hadoop-1.3.0.M1.jar /tmp/ bash-4.1$ hive -hiveconf hive.aux.jars.path=/tmp/elasticsearch-hadoop-1.3.0.M1.jar Logging initialized using configuration in file:/etc/hive/conf.dist/hive-log4j.properties Hive history file=/tmp/hdfs/hive_job_log_28ea1fbc-dc3b-4e62-9f47-1a88eed30069_1310993479.txt hive> select id,name from user_source; Total MapReduce jobs = 1 Launching Job 1 out of 1 Number of reduce tasks is set to 0 since there's no reduce operator Starting Job = job_201312162220_0004, Tracking URL = http://localhost:50030/jobdetails.jsp?jobid=job_201312162220_0004 Kill Command = /usr/lib/hadoop/bin/hadoop job -kill job_201312162220_0004 Hadoop job information for Stage-1: number of mappers: 1; number of reducers: 0 2013-12-17 01:36:28,086 Stage-1 map = 0%, reduce = 0% 2013-12-17 01:36:34,141 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.88 sec 2013-12-17 01:36:35,162 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.88 sec 2013-12-17 01:36:36,177 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.88 sec 2013-12-17 01:36:37,184 Stage-1 map = 100%, reduce = 0%, Cumulative CPU 0.88 sec 2013-12-17 01:36:38,204 Stage-1 map = 100%, reduce = 100%, Cumulative CPU 0.88 sec MapReduce Total cumulative CPU time: 880 msec Ended Job = job_201312162220_0004 MapReduce Jobs Launched: Job 0: Map: 1 Cumulative CPU: 0.88 sec HDFS Read: 247 HDFS Write: 24 SUCCESS Total MapReduce CPU Time Spent: 880 msec OK NULL NULL NULL NULL NULL NULL NULL NULL Time taken: 25.999 seconds #慢，数据怎么是空的，建成外表了(EXTERNAL)，没有设置默认的分隔符,好纠结 hive> drop table user_source; OK Time taken: 0.649 seconds hive> CREATE TABLE user_source (id INT, name STRING) ROW FORMAT DELIMITED FIELDS TERMINATED BY ','; OK Time taken: 0.109 seconds hive> LOAD DATA LOCAL INPATH '/tmp/files1.txt' INTO TABLE user_source; Copying data from file:/tmp/files1.txt Copying file: file:/tmp/files1.txt Loading data to table default.user_source Table default.user_source stats: [num_partitions: 0, num_files: 1, num_rows: 0, total_size: 29, raw_data_size: 0] OK Time taken: 0.348 seconds hive> select * from user_source; OK 1 medcl 2 lcdem 3 tom 4 jack Time taken: 0.155 seconds #源表现在有了，导入到ES所在的表里面去 hive> INSERT OVERWRITE TABLE user > SELECT s.id, s.name FROM user_source s; Total MapReduce jobs = 1 Launching Job 1 out of 1 Number of reduce tasks is set to 0 since there's no reduce operator Starting Job = job_201312162220_0005, Tracking URL = http://localhost:50030/jobdetails.jsp?jobid=job_201312162220_0005 Kill Command = /usr/lib/hadoop/bin/hadoop job -kill job_201312162220_0005 Hadoop job information for Stage-0: number of mappers: 1; number of reducers: 0 2013-12-17 01:50:52,141 Stage-0 map = 0%, reduce = 0% 2013-12-17 01:51:03,220 Stage-0 map = 100%, reduce = 0%, Cumulative CPU 1.16 sec 2013-12-17 01:51:04,243 Stage-0 map = 100%, reduce = 0%, Cumulative CPU 1.16 sec 2013-12-17 01:51:05,254 Stage-0 map = 100%, reduce = 0%, Cumulative CPU 1.16 sec 2013-12-17 01:51:06,266 Stage-0 map = 100%, reduce = 0%, Cumulative CPU 1.16 sec 2013-12-17 01:51:07,294 Stage-0 map = 100%, reduce = 100%, Cumulative CPU 1.16 sec MapReduce Total cumulative CPU time: 1 seconds 160 msec Ended Job = job_201312162220_0005 4 Rows loaded to user MapReduce Jobs Launched: Job 0: Map: 1 Cumulative CPU: 1.16 sec HDFS Read: 247 HDFS Write: 0 SUCCESS Total MapReduce CPU Time Spent: 1 seconds 160 msec OK Time taken: 21.849 seconds hive> select * from user; OK Failed with exception java.io.IOException:java.lang.IllegalStateException: [GET] on [/index/user/&search_type=scan&scroll=10m&size=50&preference=_shards:4;_only_node:MP7Zl3owTRm8O2V6cWvOSg] failed; server[http://10.0.2.15:9200] returned [{"_index":"index","_type":"user","_id":"&search_type=scan&scroll=10m&size=50&preference=_shards:4;_only_node:MP7Zl3owTRm8O2V6cWvOSg","exists":false}] Time taken: 0.387 seconds #可以看出来hadoop-elasticsearch翻译出来的查询语句好像有问题！不过elasticsearch里面已经有数据了，反正暂时不需要用hive来执行查询，先官方发个issue吧。 #ES查询结果 bash-4.1$ curl localhost:9200/index/user/_search?q=*&pretty=true [1] 13588 bash-4.1$ {"took":3,"timed_out":false,"_shards":{"total":5,"successful":5,"failed":0},"hits":{"total":4,"max_score":1.0,"hits":[{"_index":"index","_type":"user","_id":"3x4bEcriRvS6AHkX2Sb7UA","_score":1.0, "_source" : {"id":2,"name":"lcdem"}},{"_index":"index","_type":"user","_id":"_3rGVWhaTSCixYxRzBUSLQ","_score":1.0, "_source" : {"id":4,"name":"jack"}},{"_index":"index","_type":"user","_id":"T-Q_icjgR8ehsH3IV-twWw","_score":1.0, "_source" : {"id":1,"name":"medcl"}},{"_index":"index","_type":"user","_id":"Vdz0sryBT5u0e9hfoMY8Tg","_score":1.0, "_source" : {"id":3,"name":"tom"}}]}} #接下来试试大量数据bulk导入的性能，是不是真的做到data locality。
elasticsearch-hadoop下载地址：https://github.com/elastic/elasticsearch-hadoop