Revert "YARN-9545. Create healthcheck REST endpoint for ATSv2. Contributed by Zoltan Siegl."

This reverts commit d65371c4e8bbb4ae655ccacda389cd37a18fab32.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/api/records/timeline/TimelineHealth.java

@@ -1,82 +0,0 @@
-/**
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.hadoop.yarn.api.records.timeline;
-
-
-import org.apache.hadoop.classification.InterfaceAudience;
-import org.apache.hadoop.classification.InterfaceStability;
-
-import javax.xml.bind.annotation.XmlAccessType;
-import javax.xml.bind.annotation.XmlAccessorType;
-import javax.xml.bind.annotation.XmlElement;
-import javax.xml.bind.annotation.XmlRootElement;
-
-/**
- * This class holds health information for ATS.
- */
-@XmlRootElement(name = "health")
-@XmlAccessorType(XmlAccessType.NONE)
-@InterfaceAudience.Public
-@InterfaceStability.Unstable
-public class TimelineHealth {
-
-  /**
-   * Timline health status.
-   *
-   * RUNNING - Service is up and running
-   * READER_CONNECTION_FAULURE - isConnectionAlive() of reader implementation
-   *    reported an error
-   */
-  public enum TimelineHealthStatus {
-    RUNNING,
-    READER_CONNECTION_FAILURE
-  }
-
-  private TimelineHealthStatus healthStatus;
-  private String diagnosticsInfo;
-
-  public TimelineHealth(TimelineHealthStatus healthy, String diagnosticsInfo) {
-    this.healthStatus = healthy;
-    this.diagnosticsInfo = diagnosticsInfo;
-  }
-
-  public TimelineHealth() {
-
-  }
-
-  @XmlElement(name = "healthStatus")
-  public TimelineHealthStatus getHealthStatus() {
-    return healthStatus;
-  }
-
-  @XmlElement(name = "diagnosticsInfo")
-  public String getDiagnosticsInfo() {
-    return diagnosticsInfo;
-  }
-
-
-  public void setHealthStatus(TimelineHealthStatus healthStatus) {
-    this.healthStatus = healthStatus;
-  }
-
-  public void setDiagnosticsInfo(String diagnosticsInfo) {
-    this.diagnosticsInfo = diagnosticsInfo;
-  }
-
-
-}

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/node_modules/.bin/apidoc

@@ -1 +0,0 @@
-../../target/generated-sources/vendor/apidoc/bin/apidoc

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/node_modules/.bin/markdown-it

@@ -1 +0,0 @@
-../../target/generated-sources/vendor/markdown-it/bin/markdown-it.js

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/node_modules/.bin/r.js

@@ -1 +0,0 @@
-../../target/generated-sources/vendor/requirejs/bin/r.js

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/node_modules/.bin/r_js

@@ -1 +0,0 @@
-../../target/generated-sources/vendor/requirejs/bin/r.js

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/node_modules/.bin/semver

@@ -1 +0,0 @@
-../../target/generated-sources/vendor/semver/bin/semver

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/node_modules/.bin/shjs

@@ -1 +0,0 @@
-../../target/generated-sources/vendor/shelljs/bin/shjs

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-catalog/hadoop-yarn-applications-catalog-webapp/yarn.lock

@@ -1,422 +0,0 @@
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-sprintf-js@~1.0.2:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
-
-stack-trace@0.0.x:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/stack-trace/-/stack-trace-0.0.10.tgz#547c70b347e8d32b4e108ea1a2a159e5fdde19c0"
-
-string_decoder@^1.1.1:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.2.0.tgz#fe86e738b19544afe70469243b2a1ee9240eae8d"
-  dependencies:
-    safe-buffer "~5.1.0"
-
-string_decoder@~1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/string_decoder/-/string_decoder-1.1.1.tgz#9cf1611ba62685d7030ae9e4ba34149c3af03fc8"
-  dependencies:
-    safe-buffer "~5.1.0"
-
-text-hex@1.0.x:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/text-hex/-/text-hex-1.0.0.tgz#69dc9c1b17446ee79a92bf5b884bb4b9127506f5"
-
-triple-beam@^1.2.0, triple-beam@^1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/triple-beam/-/triple-beam-1.3.0.tgz#a595214c7298db8339eeeee083e4d10bd8cb8dd9"
-
-uc.micro@^1.0.1, uc.micro@^1.0.5:
-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/uc.micro/-/uc.micro-1.0.6.tgz#9c411a802a409a91fc6cf74081baba34b24499ac"
-
-universalify@^0.1.0:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/universalify/-/universalify-0.1.2.tgz#b646f69be3942dabcecc9d6639c80dc105efaa66"
-
-util-deprecate@^1.0.1, util-deprecate@~1.0.1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/util-deprecate/-/util-deprecate-1.0.2.tgz#450d4dc9fa70de732762fbd2d4a28981419a0ccf"
-
-winston-transport@^4.3.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/winston-transport/-/winston-transport-4.3.0.tgz#df68c0c202482c448d9b47313c07304c2d7c2c66"
-  dependencies:
-    readable-stream "^2.3.6"
-    triple-beam "^1.2.0"
-
-winston@^3.0.0:
-  version "3.2.1"
-  resolved "https://registry.yarnpkg.com/winston/-/winston-3.2.1.tgz#63061377976c73584028be2490a1846055f77f07"
-  dependencies:
-    async "^2.6.1"
-    diagnostics "^1.1.1"
-    is-stream "^1.1.0"
-    logform "^2.1.1"
-    one-time "0.0.4"
-    readable-stream "^3.1.1"
-    stack-trace "0.0.x"
-    triple-beam "^1.3.0"
-    winston-transport "^4.3.0"
-
-wrappy@1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice-hbase/hadoop-yarn-server-timelineservice-hbase-client/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/HBaseTimelineReaderImpl.java

@@ -29,7 +29,6 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.client.Connection;
 import org.apache.hadoop.hbase.client.ConnectionFactory;
 import org.apache.hadoop.service.AbstractService;
-import org.apache.hadoop.yarn.api.records.timeline.TimelineHealth;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntityType;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
@@ -159,18 +158,6 @@ public class HBaseTimelineReaderImpl
     return reader.readEntityTypes(hbaseConf, conn);
   }
 
-  @Override
-  public TimelineHealth getHealthStatus() {
-    if (!this.isHBaseDown()) {
-      return new TimelineHealth(TimelineHealth.TimelineHealthStatus.RUNNING,
-          "");
-    } else {
-      return new TimelineHealth(
-          TimelineHealth.TimelineHealthStatus.READER_CONNECTION_FAILURE,
-          "HBase connection is down");
-    }
-  }
-
   protected static final TimelineEntityFilters MONITOR_FILTERS =
       new TimelineEntityFilters.Builder().entityLimit(1L).build();
   protected static final TimelineDataToRetrieve DATA_TO_RETRIEVE =

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/main/java/org/apache/hadoop/yarn/server/timelineservice/reader/TimelineReaderManager.java

@@ -26,7 +26,6 @@ import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.service.AbstractService;
-import org.apache.hadoop.yarn.api.records.timeline.TimelineHealth;
 import org.apache.hadoop.yarn.api.records.timelineservice.FlowActivityEntity;
 import org.apache.hadoop.yarn.api.records.timelineservice.FlowRunEntity;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity;
@@ -220,13 +219,4 @@ public class TimelineReaderManager extends AbstractService {
     }
     return callerUGI != null && adminACLsManager.isAdmin(callerUGI);
   }
-
-  /**
-   * Check if reader connection is alive.
-   *
-   * @return boolean True if reader connection is alive, false otherwise.
-   */
-  public TimelineHealth getHealthStatus() {
-    return reader.getHealthStatus();
-  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/main/java/org/apache/hadoop/yarn/server/timelineservice/reader/TimelineReaderWebServices.java

@@ -48,7 +48,6 @@ import org.apache.hadoop.http.JettyUtils;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.util.Time;
 import org.apache.hadoop.yarn.api.records.timeline.TimelineAbout;
-import org.apache.hadoop.yarn.api.records.timeline.TimelineHealth;
 import org.apache.hadoop.yarn.api.records.timelineservice.FlowActivityEntity;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntityType;
@@ -216,38 +215,6 @@ public class TimelineReaderWebServices {
     return TimelineUtils.createTimelineAbout("Timeline Reader API");
   }
 
-  /**
-   * Health check REST end point.
-   *
-   * @param req Servlet request.
-   * @param res Servlet response.
-   *
-   * @return A {@link Response} object with HTTP status 200 OK if the service
-   *         is running.
-   *         Otherwise, a {@link Response} object with HTTP status 500 is
-   *         returned.
-   */
-  @GET
-  @Path("/health")
-  @Produces(MediaType.APPLICATION_JSON + "; " + JettyUtils.UTF_8)
-  public Response health(
-      @Context HttpServletRequest req,
-      @Context HttpServletResponse res
-  ) {
-    Response response;
-    TimelineHealth timelineHealth = this.getTimelineReaderManager().getHealthStatus();
-    if (timelineHealth.getHealthStatus()
-        .equals(TimelineHealth.TimelineHealthStatus.RUNNING)) {
-      response = Response.ok(timelineHealth).build();
-    } else {
-       LOG.info("Timeline services health check: timeline reader reported " +
-           "connection failure");
-       response = Response.serverError().entity(timelineHealth).build();
-    }
-
-    return response;
-  }
-
   /**
    * Return a single entity for a given entity type and UID which is a delimited
    * string containing clusterid, userid, flow name, flowrun id and app id.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/FileSystemTimelineReaderImpl.java

@@ -42,7 +42,6 @@ import org.apache.commons.csv.CSVParser;
 import org.apache.commons.csv.CSVRecord;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.service.AbstractService;
-import org.apache.hadoop.yarn.api.records.timeline.TimelineHealth;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEvent;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineMetric;
@@ -430,26 +429,4 @@ public class FileSystemTimelineReaderImpl extends AbstractService
     }
     return result;
   }
-
-  @Override
-  public TimelineHealth getHealthStatus() {
-    try {
-      File file = new File(rootPath);
-      if (file.exists()) {
-        return new TimelineHealth(TimelineHealth.TimelineHealthStatus.RUNNING,
-            "");
-      } else {
-        return new TimelineHealth(
-          TimelineHealth.TimelineHealthStatus.READER_CONNECTION_FAILURE,
-            "Root path \"" + rootPath + "\" does not exist"
-          );
-      }
-    } catch (Exception e) {
-      return new TimelineHealth(
-          TimelineHealth.TimelineHealthStatus.READER_CONNECTION_FAILURE,
-          e.getMessage()
-          );
-    }
-
-  }
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/main/java/org/apache/hadoop/yarn/server/timelineservice/storage/TimelineReader.java

@@ -24,7 +24,6 @@ import java.util.Set;
 import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.classification.InterfaceStability.Unstable;
 import org.apache.hadoop.service.Service;
-import org.apache.hadoop.yarn.api.records.timeline.TimelineHealth;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity;
 import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineDataToRetrieve;
 import org.apache.hadoop.yarn.server.timelineservice.reader.TimelineEntityFilters;
@@ -193,11 +192,4 @@ public interface TimelineReader extends Service {
    * storage.
    */
   Set<String> getEntityTypes(TimelineReaderContext context) throws IOException;
-
-  /**
-   * Check if reader connection is working properly.
-   *
-   * @return True if reader connection works as expected, false otherwise.
-   */
-  TimelineHealth getHealthStatus();
 }

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice/src/test/java/org/apache/hadoop/yarn/server/timelineservice/reader/TestTimelineReaderWebServices.java

@@ -37,7 +37,6 @@ import org.apache.commons.io.FileUtils;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.http.JettyUtils;
 import org.apache.hadoop.yarn.api.records.timeline.TimelineAbout;
-import org.apache.hadoop.yarn.api.records.timeline.TimelineHealth;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntity;
 import org.apache.hadoop.yarn.api.records.timelineservice.TimelineEntityType;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
@@ -778,22 +777,4 @@ public class TestTimelineReaderWebServices {
       client.destroy();
     }
   }
-
-  @Test
-  public void testHealthCheck() throws Exception {
-    Client client = createClient();
-    try {
-      URI uri = URI.create("http://localhost:" + serverPort + "/ws/v2/"
-      + "timeline/health");
-      ClientResponse resp = getResponse(client, uri);
-      TimelineHealth timelineHealth =
-          resp.getEntity(new GenericType<TimelineHealth>() {
-          });
-      assertEquals(200, resp.getStatus());
-      assertEquals(TimelineHealth.TimelineHealthStatus.RUNNING,
-          timelineHealth.getHealthStatus());
-    } finally {
-      client.destroy();
-    }
-  }
 }