JMeter 在测试 10k+ 用户时由于 OutOfMemoryError 无法创建新线程

Question

我的测试发出一个

POST

请求，然后发出

N

PUT

请求，其中

N

是用户数。我也把回复保存在里面

target

当测试超过 10,000 个用户时，JMeter 失败并显示：

Uncaught Exception java.lang.OutOfMemoryError: Java heap space in thread Thread[MyCoolTest 1-3165,5,main]. See log file for details.

一段时间后，我的内存似乎耗尽了。

1. 根本原因是什么？
2. 当我在 CircleCI 的 docker 镜像中运行 JMeter 时，有没有办法增加它的内存？ （我假设我可以找到

   jmeter.bat

   文件并增加

   Xmx

   .

我发现一些与此问题相关的文章是here

环境： JMeter 运行在 CircleCI linux 机器上：

• 操作系统：Ubuntu 20.04.5 LTS
• 操作系统类型：linux
• 架构：x86_64
• Java版本：openjdk:11.0
• JMeter版本：5.5

Dependency Mngmt: Maven installs JMeter inside docker image

日志中的更多详细信息：

java.lang.OutOfMemoryError: Java heap space
    at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:61) ~[?:?]
    at java.nio.ByteBuffer.allocate(ByteBuffer.java:348) ~[?:?]
    at org.apache.logging.log4j.core.layout.StringBuilderEncoder.getThreadLocalState(StringBuilderEncoder.java:82) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.layout.StringBuilderEncoder.encode(StringBuilderEncoder.java:64) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.layout.StringBuilderEncoder.encode(StringBuilderEncoder.java:32) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.layout.PatternLayout.encode(PatternLayout.java:231) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.layout.PatternLayout.encode(PatternLayout.java:59) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:197) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:190) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:181) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:543) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:502) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:485) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:460) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:82) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.core.Logger.log(Logger.java:161) ~[log4j-core-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2198) ~[log4j-api-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2152) ~[log4j-api-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2135) ~[log4j-api-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2028) ~[log4j-api-2.13.1.jar:2.13.1]
    at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1899) ~[log4j-api-2.13.1.jar:2.13.1]
    at org.apache.logging.slf4j.Log4jLogger.info(Log4jLogger.java:184) ~[log4j-slf4j-impl-2.13.1.jar:2.13.1]
    at org.apache.jmeter.threads.JMeterThread.initRun(JMeterThread.java:712) ~[ApacheJMeter_core-5.3.jar:5.3]
    at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:252) ~[ApacheJMeter_core-5.3.jar:5.3]
    at java.lang.Thread.run(Thread.java:829) [?:?]

不知道从何开始