<?xml version="1.0" encoding="UTF-8" standalone="no"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>6.2. Run Time Errors and Warnings</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta name="generator" content="publican 2.8" /><meta name="package" content="Systemtap-SystemTap_Beginners_Guide-2.1-en-US-2.1-2" /><link rel="home" href="index.html" title="SystemTap Beginners Guide" /><link rel="up" href="errors.html" title="Chapter 6. Understanding SystemTap Errors" /><link rel="prev" href="errors.html" title="Chapter 6. Understanding SystemTap Errors" /><link rel="next" href="references.html" title="Chapter 7. References" /></head><body><p id="title"><a class="left" href="http://www.fedoraproject.org"><img src="Common_Content/images/image_left.png" alt="Product Site" /></a><a class="right" href="http://docs.fedoraproject.org"><img src="Common_Content/images/image_right.png" alt="Documentation Site" /></a></p><ul class="docnav"><li class="previous"><a accesskey="p" href="errors.html"><strong>Prev</strong></a></li><li class="next"><a accesskey="n" href="references.html"><strong>Next</strong></a></li></ul><div class="section" id="runtimeerror"><div class="titlepage"><div><div keep-together.within-column="always"><h2 class="title" id="runtimeerror">6.2. Run Time Errors and Warnings</h2></div></div></div><a id="idp37263568" class="indexterm"></a><a id="idp37264296" class="indexterm"></a><a id="idp37265000" class="indexterm"></a><div class="para"> Runtime errors and warnings occur when the SystemTap instrumentation has been installed and is collecting data on the system. </div><div class="formalpara"><h5 class="formalpara" id="idm18229632">WARNING: Number of errors: <em class="replaceable"><code>N</code></em>, skipped probes: <em class="replaceable"><code>M</code></em></h5><a id="idm18228648" class="indexterm"></a><a id="idm18571736" class="indexterm"></a><a id="idm18570808" class="indexterm"></a><a id="idm18569856" class="indexterm"></a> Errors and/or skipped probes occurred during this run. Both <em class="replaceable"><code>N</code></em> and <em class="replaceable"><code>M</code></em> are the counts of the number of probes that were not executed due to conditions such as too much time required to execute event handlers over an interval of time. </div><div class="formalpara"><h5 class="formalpara" id="idm8216136">division by 0</h5><a id="idm8215608" class="indexterm"></a><a id="idp8804560" class="indexterm"></a><a id="idp8805488" class="indexterm"></a><a id="idm5673280" class="indexterm"></a><a id="idm5672368" class="indexterm"></a> The script code performed an invalid division. </div><div class="formalpara"><h5 class="formalpara" id="idm5671048">aggregate element not found</h5><a id="idm5685088" class="indexterm"></a><a id="idm5684136" class="indexterm"></a><a id="idp36665064" class="indexterm"></a><a id="idp36666016" class="indexterm"></a> A statistics extractor function other than <code class="command">@count</code> was invoked on an aggregate that has not had any values accumulated yet. This is similar to a division by zero. </div><div class="formalpara"><h5 class="formalpara" id="idm8346392">aggregation overflow</h5><a id="idm8345864" class="indexterm"></a><a id="idm8344912" class="indexterm"></a><a id="idm21863208" class="indexterm"></a><a id="idm21862256" class="indexterm"></a><a id="idm21861304" class="indexterm"></a> An array containing aggregate values contains too many distinct key pairs at this time. </div><div class="formalpara"><h5 class="formalpara" id="idp534288">MAXNESTING exceeded</h5><a id="idp534672" class="indexterm"></a><a id="idp8232008" class="indexterm"></a><a id="idp8232936" class="indexterm"></a><a id="idp8233888" class="indexterm"></a><a id="idm7110040" class="indexterm"></a> Too many levels of function call nesting were attempted. The default nesting of function calls allowed is 10. </div><div class="formalpara"><h5 class="formalpara" id="idm7108656">MAXACTION exceeded</h5><a id="idp1268248" class="indexterm"></a><a id="idp1269200" class="indexterm"></a><a id="idp1270128" class="indexterm"></a><a id="idp7959456" class="indexterm"></a><a id="idp7960408" class="indexterm"></a> The probe handler attempted to execute too many statements in the probe handler. The default number of actions allowed in a probe handler is 1000. </div><div class="formalpara"><h5 class="formalpara" id="idp8195696">kernel/user string copy fault at <em class="replaceable"><code>ADDR</code></em></h5><a id="idp8196424" class="indexterm"></a><a id="idp8197392" class="indexterm"></a><a id="idm4452720" class="indexterm"></a><a id="idm4451752" class="indexterm"></a> The probe handler attempted to copy a string from kernel or user-space at an invalid address (<em class="replaceable"><code>ADDR</code></em>). </div><div class="formalpara"><h5 class="formalpara" id="idp7963288">pointer dereference fault</h5><a id="idp7963816" class="indexterm"></a><a id="idp7964768" class="indexterm"></a><a id="idp6078976" class="indexterm"></a><a id="idp6079928" class="indexterm"></a> There was a fault encountered during a pointer dereference operation such as a target variable evaluation. </div></div><ul class="docnav"><li class="previous"><a accesskey="p" href="errors.html"><strong>Prev</strong>Chapter 6. Understanding SystemTap Errors</a></li><li class="up"><a accesskey="u" href="#"><strong>Up</strong></a></li><li class="home"><a accesskey="h" href="index.html"><strong>Home</strong></a></li><li class="next"><a accesskey="n" href="references.html"><strong>Next</strong>Chapter 7. References</a></li></ul></body></html>
