vert.x eventloop线程块inet6addressimpl.lookupallhostaddr

nle07wnf 于 2021-06-06 发布在 Kafka

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我在启动kafka producer时搜索dns条目（？）时遇到超过4秒的非常奇怪的线程阻塞，异常：

2019-02-11 10:00:33,982 WARN [vertx-blocked-thread-checker] io.vertx.core.impl.BlockedThreadChecker - Thread Thread[vert.x-eventloop-thread-0,5,main] has been blocked for 4172 ms, time limit is 1000 ms
io.vertx.core.VertxException: Thread blocked
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)
    at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324)
    at java.net.InetAddress.getAllByName0(InetAddress.java:1277)
    at java.net.InetAddress.getAllByName(InetAddress.java:1193)
    at java.net.InetAddress.getAllByName(InetAddress.java:1127)
    at java.net.InetAddress.getByName(InetAddress.java:1077)
    at java.net.InetSocketAddress.<init>(InetSocketAddress.java:220)
    at org.apache.kafka.clients.ClientUtils.parseAndValidateAddresses(ClientUtils.java:53)
    at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:406)
    at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:304)

它偶尔发生一次（不是每次）我可以在vertx中以编程方式禁用ipv6查找吗？我怎样才能使这个错误消失？

apache-kafka kafka-producer-api vert.x event-loop

来源：https://stackoverflow.com/questions/54666655/vert-x-eventloop-thread-block-inet6addressimpl-lookupallhostaddr

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按热度按时间

flvlnr441#

添加标志“-djava.net.preferipv4stack=true”后，它修复了问题，但打开了其他一些问题 InetAddress.getLocalHost() 返回localhost\127.0.0.1作为hostname\ip。。。为了解决这个问题，我必须在计算机中编辑/etc/hosts以：


# This file is automatically generated by our bootstrap script.

<MACHINE_IP> <MACHINE_HOSTNAME>   # <-- Ordering ...
127.0.0.1 localhost

# The following lines are desirable for IPv6 capable hosts

# ::1 ip6-localhost ip6-loopback <MACHINE_HOSTNAME>   <-- IPV6 must be disabled

在禁用/etc/hosts的所有ipv6部分后，正确的主机名和ip被解析，并且我的程序被正确启动

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vert.x eventloop线程块inet6addressimpl.lookupallhostaddr

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