Re: How to add dependencies on the custom services

dp1 · ‎07-19-2018

thanks for your answer. this means that the first three numbers are referring to hbase itself, and the last ones to the HDP version?in your example HDP 3.0.0.0. is this correct?

dp1 · ‎07-19-2018

Hi, I'm looking for a list of artifact-versions for HDP 3.0 in order to use with Maven (Java), so I get the correct version for e.g. hbase-client. I can't seem to find the list. Thanks in advance

dp1 · ‎12-15-2017

Hello, I have a service that connects to Hive via JDBC. When I start it on a machine (A) it's writing data to Hive. When I start the same service again on another machine (B) the call pstmt.executeUpdate(); does not return. there is no exception or anything, I had it running for more than 10 minutes as well. Why is it working on one machine, but not the other? it's the same connection string. Thanks and BR

dp1 · ‎12-13-2017

thanks for your response @ghagleitner . short answer: unfortunately no long answer: we use HBase as primary storage, but at the same time we want to write it to Hive, where the data resides longer than within HBase (we set a TTL on the HBase tables). Within Hive we do not want the same amount of columns, only a few of them, and some "aggregated" so we do not have to adapt the table schema within Hive every time a new column is added within HBase. At the moment we use AMQ for messaging to the Hive-write service. But we plan on introducing Kafka. Is there a better way when using Kafka? Any other ideas that might pop into your head?

dp1 · ‎12-12-2017

Hello, we have Hive (version 1.2.1000) running in our cluster. I'm using JDBC to write data to a hive table. I see that performance of adding data isn't that great (at some point it takes up to 10s or even more) for one insert. The table has four columns, one String, one BIGINT, and two Binary. I tried using batch, but the batch operations aren't supported with the jdbc driver. Next I tried using connection pooling (tomcat-jdbc), but it doesn't seem to work either. I receive the following error message: org.apache.thrift.transport.TTransportException: java.net.SocketException: Socket closed Any ideas on what I can use in order to improve write performance? Thanks

dp1 · ‎12-12-2017

ok, thanks for the info.

dp1 · ‎09-20-2017

Hi @amagyar , thanks for your explanations! My remaining question is, where can I find the log lines that I added to my 'status' method, and the ones within the service_check.py file ? I assume on the host the service itself is located, but I can't find the file. Thanks

dp1 · ‎08-09-2017

I've got most of the fields descriptions of a 'metainfo.xml' file from the wiki page But unfortunately some of the fields are not described. For instance: logs within a component definition, what's the impact? bulkCommands within a component definition, what's the impact? Would be great to get some clarification on these fields. Thanks

dp1 · ‎08-09-2017

I don't know of any best practice, but I did refer to an existing service, e.g. HBase This example shows that the dependencies are only defined for the Master component. But anyhow, it totally depends on your components. So if your slave depends on having e.g. a RegionServer on the same host you should add this dependency to your slave component. If you just require to have a RegionServer on the cluster I'd just go with defining the dependency at the Master component. What's also important is the '<requiredServices>' section in the sample linked to above. I hope this information helps.

dp1 · ‎08-09-2017

Thanks for your answer @Akhil S Naik. It seems that it really was the issue with the config. I now changed my service to contain a config, although it's not used, but I don't have the issue anymore. Nevertheless, I didn't test the ambari-server configuration change, as it would have only been a workaround for me.

dp1 · ‎08-09-2017

Hello, I'm curious on the status functions implemented for the service ('service_check') and it's component(s). As seen with HBase service, there's a 'commandScript' defined within 'metainfo.xml' which is referencing to 'scripts/service_check.py' and is on the same level as '<components>' On the other hand, on a components' class (subclass of 'Script') you have the def status(self, env): I see the 'service_check' is executed upon installation, and I can see the log entries within the Ambari UI, but I haven't seen the log entries anywhere else yet. So my questions are: 1. When is which function called? 2. Each function uses the 'Logger', where can I find the log lines for both the service_check and the component's status? Thanks

dp1 · ‎08-07-2017

Thanks, but as the site states Note: These API calls do not uninstall the packages associated with the service and neither they remove the config or temp folders associated with the service components. I'm looking for a way to execute some code when a component gets uninstalled. Thanks

dp1 · ‎08-07-2017

When I'm trying to test an (express) upgrade of a stack including my custom component I get the following error: Last Service Check should be more recent than the last configuration change for the given service Reason: Unexpected server error happenedFailed on: As you can see, it doesn't tell me which component. Anyhow, as I'm having my own component installed with the stack I suppose it's my own. My colleague now pointed out that it's maybe because I do not have a "Config" tab in my component. Could this be the issue? To shortly explain what my service does: I want to be able to have 2+ RegionServers on one host, thus I just copy the configuration from the original RegionServer and just do some changes within two configuration files before the component gets started. That's why I do not need any configuration within Ambari itself. Hopefully somebody can explain a bit about my issue. Thanks

dp1 · ‎08-03-2017

hi @Sayed Anisul Hoque. @1. you already linked to the resources handling custom services, maybe the sub-menu brings more light @2. depdency.name: this is <Service>/<Component>, have a look at the other metainfo.xml definitions. As another example, if you depend on an HBase Master you would write HBASE/HBASE_MASTER @2 dependency.scope: this is the scope the dependency has to have. In your example, 'cluster' means that a Zookeeper Server has to be installed somewhere on your cluster. When you have scope 'host' it would mean that the component Zookeeper Server has to be on the same host as your custom service. Hope that helps.

dp1 · ‎08-02-2017

Hello, In order to define some role order for my custom service I followed the instructions as displayed here: https://cwiki.apache.org/confluence/display/AMBARI/How-To+Define+Stacks+and+Services#How-ToDefineStacksandServices-RoleCommandOrder The content of my 'role_command_order.json' file: {<br> "_comment": "RS_HBASE orders",<br> "general_deps": {<br> "HBASE_MASTER-STOP": ["RS_HBASE_02-STOP"],<br> "RS_HBASE_02-START": ["HBASE_MASTER-START"]<br> },<br> "optional_no_glusterfs": {<br> "HBASE_MASTER-STOP": ["RS_HBASE_02-STOP"],<br> "RS_HBASE_02-START": ["HBASE_MASTER-START"]<br> }<br>} and the file is located within the same folder as my 'metainfo.xml' service definition. So far so good. I would have expected that my service gets stopped when I stop the HBASE_MASTER, but no, it doesn't stop. What did I miss? Thanks Edit: I changed the contents to the following: { "_comment": "RS_HBASE orders", "general_deps": { "_comment" : "dependencies for all cases", "HBASE_MASTER-STOP": ["RS_HBASE_02-STOP"], "RS_HBASE_02-START": ["HBASE_MASTER-START"] } } I place the file right next to my 'metainfo.xml' , but still nothing. Why is this file ignored? I can't find any additional information that would point me to another direction I can try. Any help is appreciated.

dp1 · ‎08-01-2017

@Jay SenSharma yes, it's my custom component, and a directory with the name is present within /usr/hdp/current. Any idea why I get this error? Anything else I need to be aware of?

dp1 · ‎08-01-2017

Another warning I get when I restart the ambari-server is within ambari-server-check-database.log WARN - Service(s): RS_02, from cluster testc has no config(s) in serviceconfig table! What does this warning mean in particular? What do I have to do in order to get rid of it? Thanks

dp1 · ‎07-28-2017

I want to execute some code when I delete a service, basically clean-up of my custom service. At https://cwiki.apache.org/confluence/display/AMBARI/How-To+Define+Stacks+and+Services#How-ToDefineStacksandServices-Commands I found supported commands. So in order to uninstall I'd guess to override 'uninstall' method. Is this correct? I looked into the HBase definitions, but there ain't any definition for uninstall, can you explain me why? As I just realized, when I delete my service, it's not within Ambari-UI anymore, but the service is still running. In case I just want to 'delete' a service via Ambari, what method gets triggered? Thanks. Edit/Update: I implemented the 'uninstall' method within my service, but it's not getting called. I added log-lines, but I can't see them anywhere, and nothing that's supposed to happen (deleting files etc) is happening. Can you please tell me what I have to do in order to let something happen on deletion of my service? Thanks. Any ideas?

dp1 · ‎07-26-2017

Thanks for the hint. The log files provided me further details, but in the end I ended up with other problems. see my other questions. Thanks

dp1 · ‎07-26-2017

I (kind of) managed to change the files when they get copied during installation, and I'm changing the files after the copy via python. Anyhow, I'm having another issue now, see my question: https://community.hortonworks.com/questions/115875/unable-to-determine-stack-version-for-custom-servi.html Thanks

dp1 · ‎07-26-2017

I'm trying to add a custom service, an additional region server (see my other questions), but I'm getting the following error message: Could not determine stack version for component hbase-regionserver-01 by calling '/usr/bin/hdp-select status hbase-regionserver-01 > /tmp/tmplhosIC'. Return Code: 1, Output: ERROR: Invalid package - hbase-regionserver-01 What method do I have to provide in order to make this call succeed ? Edit: I just tried to test the upgrade, and it seems that the issue is critial for upgrade as well. I get the following message: The following components were found to have version mismatches. Finalize will not complete successfully: c6403.ambari.apache.org: RS_HBASE_02/RS_HBASE_02 reports UNKNOWN Thanks in advance for any hints.

dp1 · ‎06-30-2017

Thanks for the hint, but I'm looking for a way to change settings of the copied hbase-site.xml and hbase-env.sh file, before it gets started, via python.

dp1 · ‎06-29-2017

Hi, I'm trying to add an additional regionserver to a (HBase) cluster. I have the following metainfo.xml <metainfo> <schemaVersion>2.0</schemaVersion> <services> <service> <name>RS_HBASE_01</name> <displayName>RS-HBASE-01</displayName> <comment>Additional Regionserver on a host</comment> <version>1.1.2</version> <components> <component> <name>RS_HBASE_01</name> <displayName>RS-01</displayName> <category>SLAVE</category> <cardinality>1+</cardinality> <versionAdvertised>true</versionAdvertised> <decommissionAllowed>true</decommissionAllowed>  <timelineAppid>HBASE</timelineAppid>  <dependencies> <dependency> <name>HBASE/HBASE_MASTER</name> <scope>cluster</scope> <auto-deploy> <enabled>true</enabled>  </auto-deploy> </dependency> <dependency> <name>HBASE/HBASE_REGIONSERVER</name> <scope>host</scope> <auto-deploy> <enabled>true</enabled> </auto-deploy> </dependency> </dependencies> <commandScript> <script>scripts/hbase_regionserver.py</script> <scriptType>PYTHON</scriptType> <timeout>1200</timeout> </commandScript> <bulkCommands> <displayName>RegionServers</displayName>  <masterComponent>HBASE/HBASE_MASTER</masterComponent> </bulkCommands> <logs> <log> <logId>hbase_regionserver01</logId> <primary>true</primary> </log> </logs> </component> </components> <commandScript> <script>scripts/service_check.py</script> <scriptType>PYTHON</scriptType> <timeout>300</timeout> </commandScript>  <requiredServices> <service>ZOOKEEPER</service> <service>HDFS</service> <service>HBASE</service> </requiredServices>  <configuration-dependencies> <config-type>core-site</config-type>  <config-type>hbase-policy</config-type> <config-type>hbase-site</config-type> <config-type>hbase-env</config-type> <config-type>hbase-log4j</config-type> </configuration-dependencies> </service> </services> </metainfo> where I define my required services, and also the configuration files I need from the other services. The installation itself works already, all files/symlinks are created and put into their directoy. But in order to successfully start up I need some configuration values changed, e.g. hbase.regionserver.port and hbase.regionserver.info.port (within hbase-site.xml) , PID file location, log-file name etc (within hbase-env.sh) . How can I change the values in the configuration files? I suppose there is some helper method where I can read the configuration file before starting, and change the values. Thanks for your suggestions.

dp1 · ‎06-29-2017

Hi @Riccardo Iacomini, I found those two examples quite helpful: - https://github.com/geniuszhe/ambari-mongodb-cluster - https://github.com/abajwa-hw/ntpd-stack I suppose you have your own services, if so, I'd create my own repo (rpm repo for centos e.g. as in the mongodb example) where you have your services packaged and ready to install.

dp1 · ‎06-27-2017

Thanks for the info @jaimin. I just re-created my virtual machines, now with Ambari 2.4.0 instead of 2.2.2.0. My custom service is again added to the stack definition, and now I'm able to assign masters and slaves, including my custom service. So maybe it's a problem with the 'old' version. The error I now get is org.apache.ambari.server.controller.spi.SystemException: An internal system exception occurred: Configuration with tag 'version1' exists for 'hbase-env' ambari-server.log ClusterImpl:2523 - Looking for service for config types [hbase-env] 27 Jun 2017 07:27:07,652 ERROR [ambari-client-thread-24] AbstractResourceProvider:343 - Caught AmbariException when modifying a resource org.apache.ambari.server.AmbariException: Configuration with tag 'version1' exists for 'hbase-env' at org.apache.ambari.server.controller.AmbariManagementControllerImpl.createConfiguration(AmbariManagementControllerImpl.java:855) at org.apache.ambari.server.controller.AmbariManagementControllerImpl.updateCluster(AmbariManagementControllerImpl.java:1653) at org.apache.ambari.server.controller.AmbariManagementControllerImpl.updateClusters(AmbariManagementControllerImpl.java:1473) at org.apache.ambari.server.controller.internal.ClusterResourceProvider$2.invoke(ClusterResourceProvider.java:311) at org.apache.ambari.server.controller.internal.ClusterResourceProvider$2.invoke(ClusterResourceProvider.java:308) at org.apache.ambari.server.controller.internal.AbstractResourceProvider.invokeWithRetry(AbstractResourceProvider.java:455) at org.apache.ambari.server.controller.internal.AbstractResourceProvider.modifyResources(AbstractResourceProvider.java:336) at org.apache.ambari.server.controller.internal.ClusterResourceProvider.updateResourcesAuthorized(ClusterResourceProvider.java:308) at org.apache.ambari.server.controller.internal.AbstractAuthorizedResourceProvider.updateResources(AbstractAuthorizedResourceProvider.java:301) at org.apache.ambari.server.controller.internal.ClusterControllerImpl.updateResources(ClusterControllerImpl.java:319) at org.apache.ambari.server.api.services.persistence.PersistenceManagerImpl.update(PersistenceManagerImpl.java:125) at org.apache.ambari.server.api.handlers.UpdateHandler.persist(UpdateHandler.java:45) at org.apache.ambari.server.api.handlers.BaseManagementHandler.handleRequest(BaseManagementHandler.java:73) at org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:145) at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:126) at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:90) at org.apache.ambari.server.api.services.ClusterService.updateCluster(ClusterService.java:142) attached the configuration and package folders of my service, the metainfo didn't change (except the version, as it's 1.1.2 now) ambari-hbase-rs.zip basically I only changed some port numbers, location for log and pid file. and I removed any code regarding Windows OS. Thanks for your help. Edit I was having some problem in my params_linux.py script, as some of the imports ain't available. Right now I can create the intended symlink, but it's pointing to a wrong location, the original RS is like this: hbase-regionserver -> /usr/hdp/2.5.6.0-40/hbase and mine is hbase-regionserver-01 -> /usr/hdp/2.5.0.0/hbase The path for the target is created within status_params.py (at the moment) looking like this: regionserver_root_dir_specific = format("{stack_root}/{stack_version_formatted}/hbase") So my question is: Is the {stack_version_formatted} wrong? (no change of the code, just re-using it) or do I have to use another variable? Thanks for your time

dp1 · ‎06-27-2017

Thanks for the hint @jaimin . Attached the files from the folder stack-recommendations.zip , unfortunately the stackadvisor.err file is empty, so I'm not sure that helps. Maybe you see a problem? Maybe a question for understanding: Do I have to define a MASTER component for a service, or is it ok if I only have SLAVEs? As in my case, the MASTER is the one from HBASE.

dp1 · ‎06-26-2017

I already posted the manual steps for adding an additional RS to an existing HBase cluster (see here ) Due to the limitation that I can't manage it via Ambari I looked at the sources and other custom service definitions for a stack. the metainfo.xml file will follow below. Anyhow, when I add this to my ambari-server the server starts and I see the new service within the components list. When I only select my new service Ambari tells me that other services are required in order to have this service running, so that's working fine. But then I get the exception: 500 status code received on GET method for API: /api/v1/stacks/HDP/versions/2.4/recommendations Error message: Server Error and the ambari-server.log shows this 26 Jun 2017 14:22:49,119 WARN [qtp-ambari-client-22] ServletHandler:563 - /api/v1/stacks/HDP/versions/2.4/recommendations java.lang.NullPointerException at org.apache.ambari.server.state.PropertyInfo.getAttributesMap(PropertyInfo.java:145) at org.apache.ambari.server.state.PropertyInfo.convertToResponse(PropertyInfo.java:128) at org.apache.ambari.server.controller.AmbariManagementControllerImpl.getStackConfigurations(AmbariManagementControllerImpl.java:3898) at org.apache.ambari.server.controller.AmbariManagementControllerImpl.getStackConfigurations(AmbariManagementControllerImpl.java:3867) at org.apache.ambari.server.controller.internal.StackConfigurationResourceProvider$1.invoke(StackConfigurationResourceProvider.java:114) at org.apache.ambari.server.controller.internal.StackConfigurationResourceProvider$1.invoke(StackConfigurationResourceProvider.java:111) at org.apache.ambari.server.controller.internal.AbstractResourceProvider.getResources(AbstractResourceProvider.java:302) at org.apache.ambari.server.controller.internal.StackConfigurationResourceProvider.getResources(StackConfigurationResourceProvider.java:111) at org.apache.ambari.server.controller.internal.ClusterControllerImpl$ExtendedResourceProviderWrapper.queryForResources(ClusterControllerImpl.java:945) at org.apache.ambari.server.controller.internal.ClusterControllerImpl.getResources(ClusterControllerImpl.java:132) at org.apache.ambari.server.api.query.QueryImpl.doQuery(QueryImpl.java:508) at org.apache.ambari.server.api.query.QueryImpl.queryForSubResources(QueryImpl.java:463) at org.apache.ambari.server.api.query.QueryImpl.queryForSubResources(QueryImpl.java:482) at org.apache.ambari.server.api.query.QueryImpl.queryForResources(QueryImpl.java:436) at org.apache.ambari.server.api.query.QueryImpl.execute(QueryImpl.java:216) at org.apache.ambari.server.api.handlers.ReadHandler.handleRequest(ReadHandler.java:68) at org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:135) at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:106) at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:75) at org.apache.ambari.server.api.services.stackadvisor.commands.StackAdvisorCommand.getServicesInformation(StackAdvisorCommand.java:356) at org.apache.ambari.server.api.services.stackadvisor.commands.StackAdvisorCommand.invoke(StackAdvisorCommand.java:247) at org.apache.ambari.server.api.services.stackadvisor.StackAdvisorHelper.recommend(StackAdvisorHelper.java:109) at org.apache.ambari.server.controller.internal.RecommendationResourceProvider.createResources(RecommendationResourceProvider.java:92) at org.apache.ambari.server.controller.internal.ClusterControllerImpl.createResources(ClusterControllerImpl.java:289) at org.apache.ambari.server.api.services.persistence.PersistenceManagerImpl.create(PersistenceManagerImpl.java:76) at org.apache.ambari.server.api.handlers.CreateHandler.persist(CreateHandler.java:36) at org.apache.ambari.server.api.handlers.BaseManagementHandler.handleRequest(BaseManagementHandler.java:72) at org.apache.ambari.server.api.services.BaseRequest.process(BaseRequest.java:135) at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:106) at org.apache.ambari.server.api.services.BaseService.handleRequest(BaseService.java:75) at org.apache.ambari.server.api.services.RecommendationService.getRecommendation(RecommendationService.java:59) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) the metainfo.xml file: <metainfo> <schemaVersion>2.0</schemaVersion> <services> <service> <name>HBASE-RS</name> <displayName>HBase-RS</displayName> <comment>Additional Regionservers on one host </comment> <version>1.1.2.2.4</version> <components> <component> <name>HBASE_REGIONSERVER_01</name> <displayName>RegionServer01</displayName> <category>MASTER</category> <cardinality>1+</cardinality> <versionAdvertised>true</versionAdvertised> <decommissionAllowed>true</decommissionAllowed> <timelineAppid>HBASE</timelineAppid> <dependencies> <dependency> <name>HBASE/HBASE_MASTER</name> <scope>cluster</scope> <auto-deploy> <enabled>false</enabled> <co-locate>HBASE/HBASE_MASTER</co-locate> </auto-deploy> </dependency> <dependency> <name>HBASE/HBASE_REGIONSERVER</name> <scope>host</scope> <auto-deploy> <enabled>false</enabled> </auto-deploy> </dependency> </dependencies> <commandScript> <script>scripts/hbase_regionserver.py</script> <scriptType>PYTHON</scriptType> <timeout>1200</timeout> </commandScript> <bulkCommands> <displayName>RegionServers</displayName>  <masterComponent>HBASE/HBASE_MASTER</masterComponent> </bulkCommands> <logs> <log> <logId>hbase_regionserver01</logId> <primary>true</primary> </log> </logs> </component> </components> <osSpecifics> <osSpecific> <osFamily>redhat6,redhat7</osFamily> <packages> <package> <name>hbase</name> </package> </packages> </osSpecific> </osSpecifics> <commandScript> <script>scripts/service_check.py</script> <scriptType>PYTHON</scriptType> <timeout>300</timeout> </commandScript> <requiredServices> <service>ZOOKEEPER</service> <service>HDFS</service> <service>HBASE</service> </requiredServices>  <configuration-dependencies> <config-type>core-site</config-type>  <config-type>hbase-policy</config-type>    </configuration-dependencies> </service> </services> I tried to set the category to SLAVE, as it basically is a SLAVE, and the master component is a HBASE_MASTER, but same error. Any ideas what I do wrong? Thanks.

dp1 · ‎06-08-2017

thanks. resolved the issue. would be nice to include this in the quick start guide

dp1 · ‎06-07-2017

I was following the instructions as shown at https://cwiki.apache.org/confluence/display/AMBARI/Quick+Start+Guide with CentOS 6.4 and installed ambari-server. The logs show that the ambari-server is up and running, but from my host machine I can't access the UI. Neither with the FQDN, nor with the IP. I tried adding a forwarded_port within vagrant c6401.vm.network :forwarded_port, guest: 8080, host: 8080 but still no luck. Any idea what I missed?

dp1 · ‎06-06-2017

Well, I finally got some time to dig a little bit deeper. I followed the instructions as shown on the wiki. First, https://cwiki.apache.org/confluence/display/AMBARI/Ambari+Development . I installed everything on my Ubuntu machine and did a maven build. rpm was successful, the one with jdeb failed for some projects, as the plugin jdeb was missing. (ambari-funtest, ambari-logsearch, ambari-metrics-grafana, ambari-metrics-storm-sink) After fixing the issues the maven build was fine on my machine. Next I tried https://cwiki.apache.org/confluence/display/AMBARI/Development+in+Docker . With this file the set-up of the container failed, firstly because of Oracle's JDK download issue (had to place it in the directory and transfer it to the docker image with the COPY command), secondly, the Maven version 3.0.5 was not enough, so I changed to the latest, 3.5.0. Anyhow, the maven build that gets executed at the end of the Dockerfile failed for several times for the ambari-server: Caused by: java.lang.OutOfMemoryError: PermGen space I tried with both the trunk and 2.5.0 branch, both times the errors. If there was some error on my side please let me know. Anyhow, doing something with Docker now is obsolete as it won't compile. So, this is just some feedback for you. Finally coming to my findings and questions: Installing HBase is managed by the HDP stack, what I'm not quite sure is, where are the scripts located? The only scripts I see are those located in ambari-server/src/main/resources/common-services - are those the correct ones? So, as I want to add multiple region servers on one host, would I just add another component referencing new scripts handling the changes I have to make? Where would I add this component, the ones in the common_scripts folder or do I need to adapt anything in the stack ? If the latter, there is no definition of components, or at least I can't find them. Thanks for any hints.

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Re: How to add dependencies on the custom services

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Re: Installing multiple Regionserver on one host v...

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Re: Adding another RS with a custom service

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