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	<title>debugging &#8211; Robust Perception | Prometheus Monitoring Experts</title>
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		<title>Debugging out of order samples</title>
		<link>/debugging-out-of-order-samples</link>
		
		<dc:creator><![CDATA[Brian Brazil]]></dc:creator>
		<pubDate>Mon, 01 Jun 2020 06:18:38 +0000</pubDate>
				<category><![CDATA[Posts]]></category>
		<category><![CDATA[debugging]]></category>
		<category><![CDATA[prometheus]]></category>
		<guid isPermaLink="false">https://www.robustperception.io/?p=5398</guid>

					<description><![CDATA[How do you debug and resolve the "Error on ingesting out-of-order samples" warning from Prometheus? The TSDB inside Prometheus is append only, once series has a sample for t=10 you can't ingest a sample for any earlier time such as t=9. If a scrape attempts to do so you'll get a warning like: level=warn ts=2020-05-26T11:01:50.938Z [&#8230;]]]></description>
		
		
		
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		<title>Using snmpbulkwalk to debug snmp_exporter issues</title>
		<link>/using-snmpbulkwalk-to-debug-snmp_exporter-issues</link>
		
		<dc:creator><![CDATA[Brian Brazil]]></dc:creator>
		<pubDate>Mon, 22 Apr 2019 08:50:10 +0000</pubDate>
				<category><![CDATA[Posts]]></category>
		<category><![CDATA[debugging]]></category>
		<category><![CDATA[prometheus]]></category>
		<category><![CDATA[snmp]]></category>
		<guid isPermaLink="false">https://www.robustperception.io/?p=4388</guid>

					<description><![CDATA[Many problems with the snmp_exporter turn out to actually be issues elsewhere, but how can you tell? SNMP can be bit mysterious at times, and sometimes the device just doesn't respond or gives weird results. You might see a scrape error like: An error has occurred during metrics gathering: error collecting metric Desc{fqName: "snmp_error", help: [&#8230;]]]></description>
		
		
		
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		<title>&#8220;INVALID&#8221; is not a valid start token and other scrape errors</title>
		<link>/invalid-is-not-a-valid-start-token-and-other-scrape-errors</link>
		
		<dc:creator><![CDATA[Brian Brazil]]></dc:creator>
		<pubDate>Mon, 11 Feb 2019 10:30:51 +0000</pubDate>
				<category><![CDATA[Posts]]></category>
		<category><![CDATA[debugging]]></category>
		<category><![CDATA[prometheus]]></category>
		<category><![CDATA[promtool]]></category>
		<guid isPermaLink="false">https://www.robustperception.io/?p=4277</guid>

					<description><![CDATA[What can you do to pin down metrics-parsing related scrape errors in Prometheus? Not all scrape errors are due to network or HTTP issues. There's also a variety of parsing errors that are possible including "INVALID" is not a valid start token, strconv.ParseFloat: parsing "...": invalid syntax, expected timestamp or new record, got "MNAME" and expected label name, got [&#8230;]]]></description>
		
		
		
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		<title>Debugging Blackbox exporter failures</title>
		<link>/debugging-blackbox-exporter-failures</link>
		
		<dc:creator><![CDATA[Brian Brazil]]></dc:creator>
		<pubDate>Mon, 22 Oct 2018 10:05:59 +0000</pubDate>
				<category><![CDATA[Posts]]></category>
		<category><![CDATA[blackbox_exporter]]></category>
		<category><![CDATA[debugging]]></category>
		<category><![CDATA[prometheus]]></category>
		<guid isPermaLink="false">https://www.robustperception.io/?p=4104</guid>

					<description><![CDATA[Ever wanted more information about Blackbox probe failures? There are three different ways to get debugging information from the Blackbox exporter. The first is to add &#38;debug=true to the probe URL, for example :9115/probe?module=http_2xx&#38;target=https://www.prometheus.io/&#38;debug=true. This will not produce metrics, but rather detailed debug information: There's three parts. The first are the logs, the second are the metrics, [&#8230;]]]></description>
		
		
		
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		<title>Viewing Logs for the JMX Exporter</title>
		<link>/viewing-logs-for-the-jmx-exporter</link>
		
		<dc:creator><![CDATA[Brian Brazil]]></dc:creator>
		<pubDate>Wed, 19 Aug 2015 17:20:01 +0000</pubDate>
				<category><![CDATA[Posts]]></category>
		<category><![CDATA[debugging]]></category>
		<category><![CDATA[java]]></category>
		<category><![CDATA[jmx exporter]]></category>
		<category><![CDATA[prometheus]]></category>
		<guid isPermaLink="false">http://www.robustperception.io/?p=757</guid>

					<description><![CDATA[Sometimes mBeans produce errors when scraped by the JMX exporter. Being able to look at detailed logs can help you figure out exactly which mBean is having issues and why. Create a file called logging.properties with this content: handlers=java.util.logging.ConsoleHandler java.util.logging.ConsoleHandler.level=ALL io.prometheus.jmx.level=ALL io.prometheus.jmx.shaded.io.prometheus.jmx.level=ALL Add the following flag to your Java invocation: -Djava.util.logging.config.file=/path/to/logging.properties If you run your [&#8230;]]]></description>
		
		
		
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