mayankshriv commented on a change in pull request #6897: URL: https://github.com/apache/incubator-pinot/pull/6897#discussion_r629580203
########## File path: pinot-controller/src/main/java/org/apache/pinot/controller/api/resources/TableDebugResource.java ########## @@ -0,0 +1,267 @@ +/** + * 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.pinot.controller.api.resources; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.fasterxml.jackson.databind.ObjectMapper; +import com.fasterxml.jackson.databind.node.ObjectNode; +import io.swagger.annotations.Api; +import io.swagger.annotations.ApiOperation; +import io.swagger.annotations.ApiParam; +import io.swagger.annotations.ApiResponse; +import io.swagger.annotations.ApiResponses; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.List; +import java.util.Map; +import java.util.concurrent.Executor; +import javax.inject.Inject; +import javax.ws.rs.GET; +import javax.ws.rs.Path; +import javax.ws.rs.PathParam; +import javax.ws.rs.Produces; +import javax.ws.rs.QueryParam; +import javax.ws.rs.core.MediaType; +import org.apache.commons.httpclient.HttpConnectionManager; +import org.apache.helix.HelixDataAccessor; +import org.apache.helix.HelixProperty; +import org.apache.helix.PropertyKey; +import org.apache.helix.model.ExternalView; +import org.apache.helix.model.IdealState; +import org.apache.helix.model.Message; +import org.apache.pinot.common.metrics.ControllerMetrics; +import org.apache.pinot.controller.ControllerConf; +import org.apache.pinot.controller.api.debug.TableDebugInfo; +import org.apache.pinot.controller.helix.core.PinotHelixResourceManager; +import org.apache.pinot.controller.util.TableSizeReader; +import org.apache.pinot.spi.config.table.TableType; +import org.apache.pinot.spi.utils.JsonUtils; +import org.apache.pinot.spi.utils.builder.TableNameBuilder; + +import static org.apache.pinot.spi.utils.CommonConstants.Helix.BROKER_RESOURCE_INSTANCE; + + +/** + * This class implements the debugging endpoints. + */ +@Api(tags = Constants.CLUSTER_TAG) +@Path("/") +public class TableDebugResource { + @Inject + PinotHelixResourceManager _pinotHelixResourceManager; + + @Inject + Executor _executor; + @Inject + HttpConnectionManager _connectionManager; + + @Inject + ControllerMetrics _controllerMetrics; + + @Inject + ControllerConf _controllerConf; + + @GET + @Path("/debug/tables/{tableName}") + @Produces(MediaType.APPLICATION_JSON) + @ApiOperation(value = "Get debug information for table.", notes = "Debug information for table.") + @ApiResponses(value = {@ApiResponse(code = 200, message = "Success"), @ApiResponse(code = 500, message = "Internal server error")}) + public String getClusterInfo( + @ApiParam(value = "Name of the table", required = true) @PathParam("tableName") String tableName, + @ApiParam(value = "OFFLINE|REALTIME") @QueryParam("type") String tableTypeStr) + throws JsonProcessingException { + ObjectNode root = JsonUtils.newObjectNode(); + root.put("clusterName", _pinotHelixResourceManager.getHelixClusterName()); + + TableType tableType = Constants.validateTableType(tableTypeStr); + List<TableType> tableTypes = (tableType == null) ? Arrays.asList(TableType.OFFLINE, TableType.REALTIME) + : Collections.singletonList(tableType); + + List<TableDebugInfo> tableDebugInfos = new ArrayList<>(); + for (TableType type : tableTypes) { + tableDebugInfos.add(debugTable(_pinotHelixResourceManager, tableName, type)); + } + return new ObjectMapper().writerWithDefaultPrettyPrinter().writeValueAsString(tableDebugInfos); + } + + /** + * Helper method to colelct debug information about the table. + * + * @param pinotHelixResourceManager Helix Resource Manager for the cluster + * @param tableName Name of the table + * @param tableType Type of the table (offline|realtime) + * @return TableDebugInfo + */ + private TableDebugInfo debugTable(PinotHelixResourceManager pinotHelixResourceManager, String tableName, + TableType tableType) { + String tableNameWithType = TableNameBuilder.forType(tableType).tableNameWithType(tableName); + + // Debug information for segments of the table. + List<TableDebugInfo.SegmentDebugInfo> segmentDebugInfos = + debugSegments(pinotHelixResourceManager, tableNameWithType); + + // Debug information from brokers of the table. + List<TableDebugInfo.BrokerDebugInfo> brokerDebugInfos = debugBrokers(tableNameWithType); + + // Debug information from servers of the table. + List<TableDebugInfo.ServerDebugInfo> serverDebugInfos = + debugServers(pinotHelixResourceManager, tableName, tableType); + + // Table size summary. + TableDebugInfo.TableSizeSummary tableSizeSummary = getTableSize(tableNameWithType); + + // Number of segments in the table. + IdealState idealState = _pinotHelixResourceManager.getTableIdealState(tableNameWithType); + int numSegments = (idealState != null) ? idealState.getPartitionSet().size() : 0; + + return new TableDebugInfo(tableNameWithType, tableSizeSummary, segmentDebugInfos, serverDebugInfos, + brokerDebugInfos, _pinotHelixResourceManager.getServerInstancesForTable(tableName, tableType).size(), + _pinotHelixResourceManager.getBrokerInstancesForTable(tableName, tableType).size(), numSegments); + } + + private TableDebugInfo.TableSizeSummary getTableSize(String tableNameWithType) { + TableSizeReader tableSizeReader = + new TableSizeReader(_executor, _connectionManager, _controllerMetrics, _pinotHelixResourceManager); + TableSizeReader.TableSizeDetails tableSizeDetails; + try { + tableSizeDetails = tableSizeReader + .getTableSizeDetails(tableNameWithType, _controllerConf.getServerAdminRequestTimeoutSeconds() * 1000); + } catch (Throwable t) { + tableSizeDetails = null; + } + + return (tableSizeDetails != null) ? new TableDebugInfo.TableSizeSummary(tableSizeDetails.reportedSizeInBytes, + tableSizeDetails.estimatedSizeInBytes) : new TableDebugInfo.TableSizeSummary(-1, -1); + } + + /** + * Helper method to debug segments. Computes differences between ideal state and external view for each segment. + * + * @param pinotHelixResourceManager Helix Resource Manager + * @param tableNameWithType Name of table with type + * @return Debug information for segments + */ + private List<TableDebugInfo.SegmentDebugInfo> debugSegments(PinotHelixResourceManager pinotHelixResourceManager, + String tableNameWithType) { + ExternalView externalView = pinotHelixResourceManager.getTableExternalView(tableNameWithType); + IdealState idealState = pinotHelixResourceManager.getTableIdealState(tableNameWithType); + + List<TableDebugInfo.SegmentDebugInfo> segmentDebugInfos = new ArrayList<>(); + if (idealState == null) { + return segmentDebugInfos; + } + + for (String segment : idealState.getPartitionSet()) { + List<TableDebugInfo.IsEvState> isEvStates = new ArrayList<>(); + for (Map.Entry<String, String> entry : idealState.getInstanceStateMap(segment).entrySet()) { + String serverName = entry.getKey(); + String isState = entry.getValue(); + + String evState = (externalView != null) ? externalView.getStateMap(segment).get(serverName) : "null"; + if (!isState.equals(evState)) { + isEvStates.add(new TableDebugInfo.IsEvState(serverName, isState, evState)); + } + } + + if (isEvStates.size() > 0) { + segmentDebugInfos.add(new TableDebugInfo.SegmentDebugInfo(segment, isEvStates)); + } + } + return segmentDebugInfos; + } + + /** + * Computes debug information for brokers. Identifies differences in ideal state and external view + * for the broker resource. + * + * @param tableNameWithType Name of table with type suffix + * @return Debug information for brokers of the table + */ + private List<TableDebugInfo.BrokerDebugInfo> debugBrokers(String tableNameWithType) { + List<TableDebugInfo.BrokerDebugInfo> brokerDebugInfos = new ArrayList<>(); + HelixDataAccessor helixDataAccessor = _pinotHelixResourceManager.getHelixZkManager().getHelixDataAccessor(); + IdealState idealState = + helixDataAccessor.getProperty(helixDataAccessor.keyBuilder().idealStates(BROKER_RESOURCE_INSTANCE)); + ExternalView externalView = + helixDataAccessor.getProperty(helixDataAccessor.keyBuilder().externalView(BROKER_RESOURCE_INSTANCE)); + + for (Map.Entry<String, String> entry : idealState.getInstanceStateMap(tableNameWithType).entrySet()) { + String brokerName = entry.getKey(); + String isState = entry.getValue(); + String evState = externalView.getStateMap(tableNameWithType).get(brokerName); + if (!isState.equals(evState)) { + brokerDebugInfos.add( + new TableDebugInfo.BrokerDebugInfo(brokerName, new TableDebugInfo.IsEvState(brokerName, isState, evState))); + } + } + return brokerDebugInfos; + } + + /** + * Computes debug information for servers. + * + * @param pinotHelixResourceManager Helix Resource Manager + * @param tableName Name of table + * @param tableType Type of table (offline|realtime) + * @return Debug information for servers of the table + */ + private List<TableDebugInfo.ServerDebugInfo> debugServers(PinotHelixResourceManager pinotHelixResourceManager, + String tableName, TableType tableType) { + HelixDataAccessor accessor = _pinotHelixResourceManager.getHelixZkManager().getHelixDataAccessor(); + List<TableDebugInfo.ServerDebugInfo> serverDebugInfos = new ArrayList<>(); + + for (String instanceName : pinotHelixResourceManager.getServerInstancesForTable(tableName, tableType)) { + PropertyKey.Builder keyBuilder = accessor.keyBuilder(); + List<String> sessionIds = accessor.getChildNames(keyBuilder.errors(instanceName)); + + if (sessionIds == null || sessionIds.size() == 0) { + return serverDebugInfos; + } + + String tableNameWithType = TableNameBuilder.forType(tableType).tableNameWithType(tableName); + int numErrors = 0; + for (String sessionId : sessionIds) { + List<HelixProperty> childValues = + accessor.getChildValues(keyBuilder.errors(instanceName, sessionId, tableNameWithType), false); + numErrors = (childValues != null) ? childValues.size() : 0; + } + + List<String> messageNames = accessor.getChildNames(accessor.keyBuilder().messages(instanceName)); + int numNewMessages = 0; + int numReadMessages = 0; + if (messageNames != null) { + for (String messageName : messageNames) { + Message message = accessor.getProperty(accessor.keyBuilder().message(instanceName, messageName)); Review comment: Yeah, however, we won't have NEW/READ messages. I think that should be ok, we definitely don't want to read lots of unstuck messages. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org
