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Yang, Tong
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Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Co-authored-by: Yang, Tong <yangtong2@huawei.com> Co-committed-by: Yang, Tong <yangtong2@huawei.com>
85 lines
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85 lines
10 KiB
HTML
<a name="ALM-16000"></a><a name="ALM-16000"></a>
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<h1 class="topictitle1">ALM-16000 Percentage of Sessions Connected to the HiveServer to Maximum Number Allowed Exceeds the Threshold</h1>
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<div id="body20412456"><div class="section" id="ALM-16000__sc831d3d8df8e4e7d9ea42281c1609170"><h4 class="sectiontitle">Description</h4><p id="ALM-16000__p2358980517502">The system detects the percentage of sessions connected to the HiveServer to the maximum number of allowed sessions every 30 seconds. This indicator can be viewed on the <strong id="ALM-16000__b17595933184111"><strong id="ALM-16000__b65951339418">Cluster</strong> </strong>> <em id="ALM-16000__i175981233194118">Name of the desired cluster</em> ><strong id="ALM-16000__b8597153310418"> Services</strong> > <strong id="ALM-16000__b17567026111711">Hive > Instance</strong> > <em id="ALM-16000__i451265517574">HiveServer instance</em><strong id="ALM-16000__b10565937186">.</strong> This alarm is generated when the percentage exceeds the default value <strong id="ALM-16000__b18486686175010">90%</strong>.</p>
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<p id="ALM-16000__p38982300175036">To change the threshold, choose <strong id="ALM-16000__b1411144994416"><strong id="ALM-16000__b741174964415">O&M > Alarm > Thresholds ></strong></strong> <em id="ALM-16000__i16416114954415">Name of the desired cluster</em> ><strong id="ALM-16000__b1941324914419"> Hive > Percentage of Sessions Connected to the HiveServer to Maximum Number of Sessions Allowed by the HiveServer</strong>.</p>
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<p id="ALM-16000__p3281852610737">When the <strong id="ALM-16000__b48421890111935">Trigger Count</strong> is 1, this alarm is cleared when the percentage is less than or equal to the threshold. When the <strong id="ALM-16000__b16940114811381">Trigger Count</strong> is greater than 1, this alarm is cleared when the percentage is less than or equal to 90% of the threshold.</p>
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</div>
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<div class="section" id="ALM-16000__s187a7d311f2347c08feb4dd832fe8117"><h4 class="sectiontitle">Attribute</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-16000__en-us_topic_0070543659_table14451679" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-16000__en-us_topic_0070543659_row8224404"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.1"><p id="ALM-16000__en-us_topic_0070543659_p62196953">Alarm ID</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.2"><p id="ALM-16000__en-us_topic_0070543659_p4788410">Alarm Severity</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.3"><p id="ALM-16000__en-us_topic_0070543659_p52316961">Automatically Cleared</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="ALM-16000__en-us_topic_0070543659_row9815411"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.1 "><p id="ALM-16000__en-us_topic_0070543659_p56850842">16000</p>
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</td>
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.2 "><p id="ALM-16000__p50799505151933">Minor</p>
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</td>
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<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.3 "><p id="ALM-16000__en-us_topic_0070543659_p7313798">Yes</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section" id="ALM-16000__s9bb9f3bcd1a246f4820491f8c8549ab6"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-16000__en-us_topic_0070543659_table55546779" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-16000__en-us_topic_0070543659_row36043739"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.1"><p id="ALM-16000__en-us_topic_0070543659_p33861718">Name</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.2"><p id="ALM-16000__en-us_topic_0070543659_p58444642">Meaning</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="ALM-16000__row719310185328"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-16000__p192431315431">Source</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-16000__p692551319435">Specifies the cluster for which the alarm is generated.</p>
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</td>
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</tr>
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<tr id="ALM-16000__en-us_topic_0070543659_row36395558"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-16000__en-us_topic_0070543659_p62359115">ServiceName</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-16000__en-us_topic_0070543659_p17923577">Specifies the service for which the alarm is generated.</p>
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</td>
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</tr>
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<tr id="ALM-16000__en-us_topic_0070543659_row27094466"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-16000__en-us_topic_0070543659_p47168143">RoleName</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-16000__en-us_topic_0070543659_p62523257">Specifies the role for which the alarm is generated.</p>
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</td>
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</tr>
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<tr id="ALM-16000__en-us_topic_0070543659_row25838404"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-16000__en-us_topic_0070543659_p12535971">HostName</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-16000__en-us_topic_0070543659_p8780755">Specifies the host for which the alarm is generated.</p>
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</td>
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</tr>
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<tr id="ALM-16000__en-us_topic_0070543659_row11917937"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-16000__en-us_topic_0070543659_p25828829">Trigger Condition</p>
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</td>
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<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-16000__en-us_topic_0070543659_p11760365">Specifies the threshold triggering the alarm. If the current indicator value exceeds this threshold, the alarm is generated.</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section" id="ALM-16000__sc45b5185e51c4a2b846ecaeb951a157c"><h4 class="sectiontitle">Impact on the System</h4><p id="ALM-16000__en-us_topic_0070543659_p13065481">If a connection alarm is generated, too many sessions are connected to Hive and new connections are unavailable.</p>
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</div>
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<div class="section" id="ALM-16000__s2d92d8aaa1c847b49a41ab9c289d613f"><h4 class="sectiontitle">Possible Causes</h4><p id="ALM-16000__en-us_topic_0070543659_p51671066">Too many clients are connected to HiveServer.</p>
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</div>
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<div class="section" id="ALM-16000__se7d98c9310774228b60be1cd9fca5ea5"><h4 class="sectiontitle">Procedure</h4><p class="tableheading" id="ALM-16000__en-us_topic_0070543659_p24606856"><strong id="ALM-16000__b12494690113844">Increase the maximum number of connections to Hive.</strong></p>
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<ol id="ALM-16000__ol51913221113853"><li id="ALM-16000__li23976605113837"><span>On the FusionInsight Manager portal, Choose <strong id="ALM-16000__b16824174417413"><strong id="ALM-16000__b12824544124114">Cluster</strong> </strong>> <em id="ALM-16000__i082715441415">Name of the desired cluster</em> ><strong id="ALM-16000__b48252448416"> Services</strong> > <strong id="ALM-16000__b40892727113837">Hive</strong> > <strong id="ALM-16000__b19803868154122">Configurations >All Configurations</strong>.</span></li><li id="ALM-16000__li63056859113837"><span>Search for <strong id="ALM-16000__b442282717522">hive.server.session.control.maxconnections</strong> and increase the value of this parameter. If the value of this parameter is <strong id="ALM-16000__b3862839517528">A</strong>, the threshold is<strong id="ALM-16000__b18817568175211"> B</strong>, and the number of sessions connected to the HiveServer is <strong id="ALM-16000__b46130074175216">C</strong>, adjust the value of this parameter according to <strong id="ALM-16000__b10412573175220">A x B > C</strong>. To view the number of sessions connected to the HiveServer, check the value of <strong id="ALM-16000__b54103805175228">Statistics for Sessions of the HiveServer</strong> on the Hive monitoring page.</span></li><li id="ALM-16000__li27872063113837"><span>Check whether the alarm is cleared.</span><p><ul class="subitemlist" id="ALM-16000__ul27684747113837"><li id="ALM-16000__li57020674113837">If yes, no further action is required.</li><li id="ALM-16000__li55271866113837">If no, go to <a href="#ALM-16000__li51857364113837">4</a>.</li></ul>
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</p></li></ol>
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<p class="tableheading" id="ALM-16000__p47836138113837"><strong id="ALM-16000__b6441871911395">Collect fault information.</strong></p>
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<ol start="4" id="ALM-16000__ol57073570113910"><li id="ALM-16000__li51857364113837"><a name="ALM-16000__li51857364113837"></a><a name="li51857364113837"></a><span>On the FusionInsight Manager portal, choose <strong id="ALM-16000__b39977366113627">O&M</strong> > <strong id="ALM-16000__b24251979113627">Log > Download</strong>.</span></li><li id="ALM-16000__li61339649113837"><span>Select <strong id="ALM-16000__b64063100113837">Hive</strong> in the required cluster from the <strong id="ALM-16000__b39696990113837">Service</strong>.</span></li><li id="ALM-16000__li1145664103113"><span>Click <span><img id="ALM-16000__image1945644173117" src="en-us_image_0269417375.png"></span> in the upper right corner, and set <strong id="ALM-16000__b6456941173117">Start Date</strong> and <strong id="ALM-16000__b11456154113318">End Date</strong> for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click <strong id="ALM-16000__b13456164113319">Download</strong>.</span></li><li id="ALM-16000__li45339947113837"><span>Contact the <span id="ALM-16000__text4614151421417">O&M personnel</span> and send the collected logs.</span></li></ol>
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</div>
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<div class="section" id="ALM-16000__section1529716184534"><h4 class="sectiontitle">Alarm Clearing</h4><p id="ALM-16000__p4677152685316">After the fault is rectified, the system automatically clears this alarm.</p>
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</div>
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<div class="section" id="ALM-16000__se3ed78f1a33140f4a070731b5418e73f"><h4 class="sectiontitle">Related Information</h4><p id="ALM-16000__en-us_topic_0070543659_p19688733">None</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_1298.html">Alarm Reference (Applicable to MRS 3.x)</a></div>
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</div>
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</div>
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