[BUG] JIRA/CONFLUENCE - JMX Exporter - crash without detail

[HujinoKun]

Suggestion

Hello,

I use the docker.io/bitnamilegacy/jmx-exporter image like you do for Jira and Confluence.

However, very recently, my JMX has become extremely slow, with timeouts of several seconds. Since the scrapeTimeout is set to 20 seconds by default, my Prometheus sends me an alert.

I use the default JMX configuration that you initialize.

I can't determine where the problem is coming from. In the Confluence logs, for example, I have the following problem:

09-Dec-2025 12:42:14.229 SEVERE [prometheus-http-1-6] e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.exporter.httpserver.HttpExchangeAdapter.sendErrorResponseWithStackTrace The Prometheus metrics HTTPServer caught an Exception while trying to send the metrics response.
	java.io.IOException: Broken pipe
		at java.base/sun.nio.ch.FileDispatcherImpl.write0(Native Method)
		at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:62)
		at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:132)
		at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:97)
		at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:53)
		at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:532)
		at jdk.httpserver/sun.net.httpserver.Request$WriteStream.write(Request.java:424)
		at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.writeChunk(ChunkedOutputStream.java:131)
		at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.write(ChunkedOutputStream.java:93)
		at jdk.httpserver/sun.net.httpserver.PlaceholderOutputStream.write(ExchangeImpl.java:463)
		at java.base/java.util.zip.DeflaterOutputStream.deflate(DeflaterOutputStream.java:284)
		at java.base/java.util.zip.DeflaterOutputStream.write(DeflaterOutputStream.java:232)
		at java.base/java.util.zip.GZIPOutputStream.write(GZIPOutputStream.java:148)
		at java.base/sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:234)
		at java.base/sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:304)
		at java.base/sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:282)
		at java.base/sun.nio.cs.StreamEncoder.write(StreamEncoder.java:132)
		at java.base/java.io.OutputStreamWriter.write(OutputStreamWriter.java:205)
		at java.base/java.io.BufferedWriter.flushBuffer(BufferedWriter.java:120)
		at java.base/java.io.BufferedWriter.write(BufferedWriter.java:233)
		at java.base/java.io.Writer.write(Writer.java:249)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.expositionformats.TextFormatUtil.writeName(TextFormatUtil.java:147)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.expositionformats.TextFormatUtil.writeLabels(TextFormatUtil.java:120)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter.writeNameAndLabels(OpenMetricsTextFormatWriter.java:405)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter.writeNameAndLabels(OpenMetricsTextFormatWriter.java:384)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter.writeUnknown(OpenMetricsTextFormatWriter.java:325)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.expositionformats.OpenMetricsTextFormatWriter.write(OpenMetricsTextFormatWriter.java:132)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.exporter.common.PrometheusScrapeHandler.handleRequest(PrometheusScrapeHandler.java:72)
		at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.exporter.httpserver.MetricsHandler.handle(MetricsHandler.java:33)
		at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:95)
		at jdk.httpserver/sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:82)
		at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:98)
		at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:855)
		at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:95)
		at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:831)
		at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
		at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
		at java.base/java.lang.Thread.run(Thread.java:840)
		Suppressed: java.io.IOException: Broken pipe
			at java.base/sun.nio.ch.FileDispatcherImpl.write0(Native Method)
			at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:62)
			at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:132)
			at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:97)
			at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:53)
			at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:532)
			at jdk.httpserver/sun.net.httpserver.Request$WriteStream.write(Request.java:424)
			at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.writeChunk(ChunkedOutputStream.java:131)
			at jdk.httpserver/sun.net.httpserver.ChunkedOutputStream.write(ChunkedOutputStream.java:93)
			at jdk.httpserver/sun.net.httpserver.PlaceholderOutputStream.write(ExchangeImpl.java:463)
			at java.base/java.util.zip.GZIPOutputStream.finish(GZIPOutputStream.java:172)
			at java.base/java.util.zip.DeflaterOutputStream.close(DeflaterOutputStream.java:267)
			at e1723a08afd7bca35570fd31a7656f59.io.prometheus.metrics.exporter.common.PrometheusScrapeHandler.handleRequest(PrometheusScrapeHandler.java:70)
			... 10 more

Product

Confluence

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[HujinoKun]

@bianchi2 Could you give me a hand with the problem and take a look at the PR I just made? Please