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Posted to issues@ozone.apache.org by "Li Cheng (Jira)" <ji...@apache.org> on 2020/02/13 06:57:00 UTC

[jira] [Commented] (HDDS-3004) S3 gateway write failure when leader OM is down and OM HA is enabled

    [ https://issues.apache.org/jira/browse/HDDS-3004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17035966#comment-17035966 ] 

Li Cheng commented on HDDS-3004:
--------------------------------

S3g logs:

2020-02-12 10:39:04,486 [qtp225472281-67] INFO org.apache.hadoop.ipc.Client: Retrying connect to server: 9.134.50.210/9.134.50.210:9862. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
...skipping...
 at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:228)
 at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
 at com.sun.proxy.$Proxy81.submitRequest(Unknown Source)
 at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
 at com.sun.proxy.$Proxy81.submitRequest(Unknown Source)
 at org.apache.hadoop.ozone.om.protocolPB.OzoneManagerProtocolClientSideTranslatorPB.submitRequest(OzoneManagerProtocolClientSideTranslatorPB.java:394)
 at org.apache.hadoop.ozone.om.protocolPB.OzoneManagerProtocolClientSideTranslatorPB.openKey(OzoneManagerProtocolClientSideTranslatorPB.java:783)
 at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at org.apache.hadoop.hdds.tracing.TraceAllMethod.invoke(TraceAllMethod.java:71)
 at com.sun.proxy.$Proxy82.openKey(Unknown Source)
 at org.apache.hadoop.ozone.client.rpc.RpcClient.createKey(RpcClient.java:629)
 at org.apache.hadoop.ozone.client.OzoneBucket.createKey(OzoneBucket.java:326)
 at org.apache.hadoop.ozone.s3.endpoint.ObjectEndpoint.put(ObjectEndpoint.java:168)
 at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:76)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:148)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:191)
 at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:200)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:103)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:493)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:415)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:104)
 at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:277)
 ... 52 more
...skipping...
 at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:228)
 at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
 at com.sun.proxy.$Proxy81.submitRequest(Unknown Source)
 at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
 at com.sun.proxy.$Proxy81.submitRequest(Unknown Source)
 at org.apache.hadoop.ozone.om.protocolPB.OzoneManagerProtocolClientSideTranslatorPB.submitRequest(OzoneManagerProtocolClientSideTranslatorPB.java:394)
 at org.apache.hadoop.ozone.om.protocolPB.OzoneManagerProtocolClientSideTranslatorPB.openKey(OzoneManagerProtocolClientSideTranslatorPB.java:783)
 at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at org.apache.hadoop.hdds.tracing.TraceAllMethod.invoke(TraceAllMethod.java:71)
 at com.sun.proxy.$Proxy82.openKey(Unknown Source)
 at org.apache.hadoop.ozone.client.rpc.RpcClient.createKey(RpcClient.java:629)
 at org.apache.hadoop.ozone.client.OzoneBucket.createKey(OzoneBucket.java:326)
 at org.apache.hadoop.ozone.s3.endpoint.ObjectEndpoint.put(ObjectEndpoint.java:168)
 at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:76)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:148)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:191)
 at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:200)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:103)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:493)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:415)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:104)
 at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:277)
 ... 52 more
...skipping...
 at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:228)
 at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
 at com.sun.proxy.$Proxy81.submitRequest(Unknown Source)
 at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
 at [org.apache.hadoop.io|https://slack-redir.net/link?url=http%3A%2F%2Forg.apache.hadoop.io].retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
 at com.sun.proxy.$Proxy81.submitRequest(Unknown Source)
 at org.apache.hadoop.ozone.om.protocolPB.OzoneManagerProtocolClientSideTranslatorPB.submitRequest(OzoneManagerProtocolClientSideTranslatorPB.java:394)
 at org.apache.hadoop.ozone.om.protocolPB.OzoneManagerProtocolClientSideTranslatorPB.openKey(OzoneManagerProtocolClientSideTranslatorPB.java:783)
 at sun.reflect.GeneratedMethodAccessor24.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at org.apache.hadoop.hdds.tracing.TraceAllMethod.invoke(TraceAllMethod.java:71)
 at com.sun.proxy.$Proxy82.openKey(Unknown Source)
 at org.apache.hadoop.ozone.client.rpc.RpcClient.createKey(RpcClient.java:629)
 at org.apache.hadoop.ozone.client.OzoneBucket.createKey(OzoneBucket.java:326)
 at org.apache.hadoop.ozone.s3.endpoint.ObjectEndpoint.put(ObjectEndpoint.java:168)
 at sun.reflect.GeneratedMethodAccessor14.invoke(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:497)
 at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:76)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:148)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:191)
 at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:200)
 at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:103)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:493)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:415)
 at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:104)
 at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:277)
 ... 52 more

> S3 gateway write failure when leader OM is down and OM HA is enabled
> --------------------------------------------------------------------
>
>                 Key: HDDS-3004
>                 URL: https://issues.apache.org/jira/browse/HDDS-3004
>             Project: Hadoop Distributed Data Store
>          Issue Type: Bug
>          Components: om
>    Affects Versions: 0.4.0
>            Reporter: Li Cheng
>            Priority: Major
>
> Use S3 gateway to keep writing data into a specific s3 gateway endpoint. After the writer starts to work, I kill the OM process on the OM leader host. After that, the s3 gateway can never allow writing data nad keeps reporting InternalError for all new coming keys.
> Process Process-488:
> S3UploadFailedError: Failed to upload ./20191204/file1056.dat to ozone-test-reproduce-123/./20191204/file1056.dat: An error occurred (500) when calling the PutObject operation (reached max retries: 4): Internal Server Error
> Process Process-489:
> S3UploadFailedError: Failed to upload ./20191204/file9631.dat to ozone-test-reproduce-123/./20191204/file9631.dat: An error occurred (500) when calling the PutObject operation (reached max retries: 4): Internal Server Error
> Process Process-490:
> S3UploadFailedError: Failed to upload ./20191204/file7520.dat to ozone-test-reproduce-123/./20191204/file7520.dat: An error occurred (500) when calling the PutObject operation (reached max retries: 4): Internal Server Error
> Process Process-491:
> S3UploadFailedError: Failed to upload ./20191204/file4220.dat to ozone-test-reproduce-123/./20191204/file4220.dat: An error occurred (500) when calling the PutObject operation (reached max retries: 4): Internal Server Error
> Process Process-492:
> S3UploadFailedError: Failed to upload ./20191204/file5523.dat to ozone-test-reproduce-123/./20191204/file5523.dat: An error occurred (500) when calling the PutObject operation (reached max retries: 4): Internal Server Error
> Process Process-493:
> S3UploadFailedError: Failed to upload ./20191204/file7520.dat to ozone-test-reproduce-123/./20191204/file7520.dat: An error occurred (500) when calling the PutObject operation (reached max retries: 4): Internal Server Error
> That's a partial list and note that all keys are different. I also tried re-enable the OM process on previous leader OM, but it doesn't help since the leader has changed. Also attach partial OM logs:
> 2020-02-12 14:57:11,128 [IPC Server handler 72 on 9862] INFO org.apache.hadoop.ipc.Server: IPC Server handler 72 on 9862, call Call#4859 Retry#0 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest from 9.134.50.210:36561
> org.apache.hadoop.ozone.om.exceptions.OMNotLeaderException: OM:om1 is not the leader. Suggested leader is OM:om2.
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.createNotLeaderException(OzoneManagerProtocolServerSideTranslatorPB.java:183)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitReadRequestToOM(OzoneManagerProtocolServerSideTranslatorPB.java:171)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.processRequest(OzoneManagerProtocolServerSideTranslatorPB.java:107)
>  at org.apache.hadoop.hdds.server.OzoneProtocolMessageDispatcher.processRequest(OzoneProtocolMessageDispatcher.java:72)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitRequest(OzoneManagerProtocolServerSideTranslatorPB.java:97)
>  at org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos$OzoneManagerService$2.callBlockingMethod(OzoneManagerProtocolProtos.java)
>  at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
>  at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
>  at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
>  at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
>  at java.security.AccessController.doPrivileged(Native Method)
>  at javax.security.auth.Subject.doAs(Subject.java:422)
>  at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
>  at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)
> 2020-02-12 14:57:11,918 [IPC Server handler 159 on 9862] INFO org.apache.hadoop.ipc.Server: IPC Server handler 159 on 9862, call Call#4864 Retry#0 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest from 9.134.50.210:36561
> org.apache.hadoop.ozone.om.exceptions.OMNotLeaderException: OM:om1 is not the leader. Suggested leader is OM:om2.
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.createNotLeaderException(OzoneManagerProtocolServerSideTranslatorPB.java:183)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitReadRequestToOM(OzoneManagerProtocolServerSideTranslatorPB.java:171)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.processRequest(OzoneManagerProtocolServerSideTranslatorPB.java:107)
>  at org.apache.hadoop.hdds.server.OzoneProtocolMessageDispatcher.processRequest(OzoneProtocolMessageDispatcher.java:72)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitRequest(OzoneManagerProtocolServerSideTranslatorPB.java:97)
>  at org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos$OzoneManagerService$2.callBlockingMethod(OzoneManagerProtocolProtos.java)
>  at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
>  at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
>  at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
>  at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
>  at java.security.AccessController.doPrivileged(Native Method)
>  at javax.security.auth.Subject.doAs(Subject.java:422)
>  at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
>  at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)
> 2020-02-12 14:57:15,395 [IPC Server handler 23 on 9862] INFO org.apache.hadoop.ipc.Server: IPC Server handler 23 on 9862, call Call#4869 Retry#0 org.apache.hadoop.ozone.om.protocol.OzoneManagerProtocol.submitRequest from 9.134.50.210:36561
> org.apache.hadoop.ozone.om.exceptions.OMNotLeaderException: OM:om1 is not the leader. Suggested leader is OM:om2.
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.createNotLeaderException(OzoneManagerProtocolServerSideTranslatorPB.java:183)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitReadRequestToOM(OzoneManagerProtocolServerSideTranslatorPB.java:171)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.processRequest(OzoneManagerProtocolServerSideTranslatorPB.java:107)
>  at org.apache.hadoop.hdds.server.OzoneProtocolMessageDispatcher.processRequest(OzoneProtocolMessageDispatcher.java:72)
>  at org.apache.hadoop.ozone.protocolPB.OzoneManagerProtocolServerSideTranslatorPB.submitRequest(OzoneManagerProtocolServerSideTranslatorPB.java:97)
>  at org.apache.hadoop.ozone.protocol.proto.OzoneManagerProtocolProtos$OzoneManagerService$2.callBlockingMethod(OzoneManagerProtocolProtos.java)
>  at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:524)
>  at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
>  at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:876)
>  at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:822)
>  at java.security.AccessController.doPrivileged(Native Method)
>  at javax.security.auth.Subject.doAs(Subject.java:422)
>  at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1730)
>  at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2682)
>  
>  
> Also attach the ozone-site.xml config to enable OM HA:
> <property>
>  <name>ozone.om.service.ids</name>
>  <value>OMHA</value>
>  </property>
>  <property>
>  <name>ozone.om.nodes.OMHA</name>
>  <value>om1,om2,om3</value>
>  </property>
>  <property>
>  <name>ozone.om.node.id</name>
>  <value>om1</value>
>  </property>
>  <property>
>  <name>ozone.om.address.OMHA.om1</name>
>  <value>9.134.50.210:9862</value>
>  </property>
>  <property>
>  <name>ozone.om.address.OMHA.om2</name>
>  <value>9.134.51.215:9862</value>
>  </property>
>  <property>
>  <name>ozone.om.address.OMHA.om3</name>
>  <value>9.134.51.25:9862</value>
>  </property>
>  <property>
>  <name>ozone.om.ratis.enable</name>
>  <value>true</value>
>  </property>
>  <property>
>  <name>ozone.enabled</name>
>  <value>true</value>
>  <tag>OZONE, REQUIRED</tag>
>  <description>
>  Status of the Ozone Object Storage service is enabled.
>  Set to true to enable Ozone.
>  Set to false to disable Ozone.
>  Unless this value is set to true, Ozone services will not be started in
>  the cluster.
> Please note: By default ozone is disabled on a hadoop cluster.
>  </description>
>  </property>



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