跳至主要內容
海豚调度连接Zookeeper超时定位

过程

在本地启动海豚调度的服务,出现zookeeper connect timeout异常,但是检查zookeeper节点都是正常的。经过一轮分析,发现个大坑!!!

海豚调度的zookeeper配置信息:

#
# 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.
#

registry.plugin.name=zookeeper
registry.servers=x.x.x.x:2181
registry.namespace=dolphinscheduler
registry.base.sleep.time.ms=60
registry.max.sleep.ms=300
registry.max.retries=5
registry.session.timeout.ms=30000
registry.connection.timeout.ms=7500
registry.block.until.connected.wait=600
registry.digest=

DHB大约 5 分钟Java问题排查海豚调度Zookeeper
生产tomcat线程阻塞问题分析

现象

当大量的请求到服务,过一会,服务无法响应请求,k8s配置了健康检查,服务被k8s重启

分析

让运维的同学把thread和heap dump了下来,打开一看,全部tomcat的线程阻塞在Druid连接池上

线程情况

image-20230329092255788_1

所有的tomcat线程堵塞在com.alibaba.druid.pool.DruidDataSource.takeLast,该方法是从Druid的连接池取出连接,当线程池没有空闲的时候,一直阻塞等待。


DHB大约 1 分钟Java问题排查Druid