org.apache.spark.ui.exec.ExecutorThreadDumpPage.scala Maven / Gradle / Ivy

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/*
 * 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.spark.ui.exec

import javax.servlet.http.HttpServletRequest

import scala.xml.{Node, Text}

import org.apache.spark.SparkContext
import org.apache.spark.ui.{SparkUITab, UIUtils, WebUIPage}

private[ui] class ExecutorThreadDumpPage(
    parent: SparkUITab,
    sc: Option[SparkContext]) extends WebUIPage("threadDump") {

  // stripXSS is called first to remove suspicious characters used in XSS attacks
  def render(request: HttpServletRequest): Seq[Node] = {
    val executorId =
      Option(UIUtils.stripXSS(request.getParameter("executorId"))).map { executorId =>
      UIUtils.decodeURLParameter(executorId)
    }.getOrElse {
      throw new IllegalArgumentException(s"Missing executorId parameter")
    }
    val time = System.currentTimeMillis()
    val maybeThreadDump = sc.get.getExecutorThreadDump(executorId)

    val content = maybeThreadDump.map { threadDump =>
      val dumpRows = threadDump.map { thread =>
        val threadId = thread.threadId
        val blockedBy = thread.blockedByThreadId match {
          case Some(_) =>
            
              Blocked by 
              Thread {thread.blockedByThreadId} {thread.blockedByLock}
            
          case None => Text("")
        }
        val heldLocks = thread.holdingLocks.mkString(", ")

        
          {threadId}
          {thread.threadName}
          {thread.threadState}
          {blockedBy}{heldLocks}
          {thread.stackTrace.html}
        
      }

    
      Updated at {UIUtils.formatDate(time)}
      {
        // scalastyle:off
        
          Expand All
        
        
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        // scalastyle:on
      }
      {dumpRows}
        
          Thread ID
          Thread Name
          Thread State
          Thread Locks
        
        
      
    
    }.getOrElse(Text("Error fetching thread dump"))
    UIUtils.headerSparkPage(request, s"Thread dump for executor $executorId", content, parent)
  }
}