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Yang, Tong
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Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Reviewed-by: Rechenburg, Matthias <matthias.rechenburg@t-systems.com> Co-authored-by: Yang, Tong <yangtong2@huawei.com> Co-committed-by: Yang, Tong <yangtong2@huawei.com>
81 lines
9.7 KiB
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81 lines
9.7 KiB
HTML
<a name="ALM-19012"></a><a name="ALM-19012"></a>
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<h1 class="topictitle1">ALM-19012 HBase System Table Directory or File Lost</h1>
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<div id="body1544598506096"><div class="section" id="ALM-19012__sb4ffbbcbbe9843cb86ae9b6b05fb5eea"><h4 class="sectiontitle">Description</h4><p id="ALM-19012__p316524116211">The system checks whether HBase directories and files exist on the HDFS every 120 seconds. This alarm is generated when the system detects that the files or directories do not exist. This alarm is cleared when the files or directories are restored.</p>
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<p id="ALM-19012__p216514162115">The HBase directories and files are as follows:</p>
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<ul id="ALM-19012__ul171653410219"><li id="ALM-19012__li17165134152114">Directory of the namespace <strong id="ALM-19012__b1216516414218">hbase</strong> on the HDFS</li><li id="ALM-19012__li416564142112"><strong id="ALM-19012__b916564118216">hbase.version</strong> file</li><li id="ALM-19012__li41651141112115">Directory of the table <strong id="ALM-19012__b216519419214">hbase:meta</strong> on the HDFS, .tableinfo file, and .regioninfo file</li><li id="ALM-19012__li316564112213">Directory of the table <strong id="ALM-19012__b216554118212">hbase:namespace</strong> on the HDFS, .tableinfo file, and .regioninfo file</li><li id="ALM-19012__li12165114142119">Directory of the table <strong id="ALM-19012__b1616504102111">hbase:hindex</strong> on the HDFS, .tableinfo file, and .regioninfo file</li><li id="ALM-19012__li21659411213">Directory of the <strong id="ALM-19012__b5165141182114">hbase:acl</strong> table on the HDFS, .tableinfo, and .regioninfo file (This table does not exist in the common mode cluster by default.)</li></ul>
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</div>
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<div class="section" id="ALM-19012__s71389bab718642a1b9f299af777bad63"><h4 class="sectiontitle">Attribute</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-19012__en-us_topic_0070543524_table31536769" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-19012__en-us_topic_0070543524_row30299850"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.1"><p id="ALM-19012__en-us_topic_0070543524_p38368787">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-19012__en-us_topic_0070543524_p20864077">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-19012__en-us_topic_0070543524_p12268704">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-19012__en-us_topic_0070543524_row54240947"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.1 "><p id="ALM-19012__en-us_topic_0070543524_p31440558">19012</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-19012__en-us_topic_0070543524_p63657274">Critical</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-19012__en-us_topic_0070543524_p55965566">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-19012__sd187279c273945a3b238f7517f568b18"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-19012__en-us_topic_0070543524_table36917027" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-19012__en-us_topic_0070543524_row16343335"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.1"><p id="ALM-19012__en-us_topic_0070543524_p48741777">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-19012__en-us_topic_0070543524_p55769855">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-19012__row19385130101"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-19012__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-19012__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-19012__en-us_topic_0070543524_row21064410"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-19012__en-us_topic_0070543524_p28495625">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-19012__p6263923266">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-19012__en-us_topic_0070543524_row36671901"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-19012__en-us_topic_0070543524_p17633966">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-19012__p1262413152619">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-19012__en-us_topic_0070543524_row37368498"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-19012__en-us_topic_0070543524_p6949536">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-19012__p627116222260">Specifies the host for which 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-19012__saa7931d75c494f168206ee267c0cbc05"><h4 class="sectiontitle">Impact on the System</h4><p id="ALM-19012__p4177204852612">The HBase service fails to restart or start.</p>
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</div>
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<div class="section" id="ALM-19012__s1cb3f01d39b04147b1050cfa338c7476"><h4 class="sectiontitle">Possible Causes</h4><p id="ALM-19012__p18021612192718">Files or directories on the HDFS are missing.</p>
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</div>
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<div class="section" id="ALM-19012__section15747722102716"><h4 class="sectiontitle">Procedure</h4><p class="tableheading" id="ALM-19012__en-us_topic_0070543524_p30826283"><strong id="ALM-19012__b1394845192812">Locate the alarm cause.</strong></p>
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<ol id="ALM-19012__ol94581441133118"><li id="ALM-19012__li12457174173118"><span>On the <span id="ALM-19012__text34789336432">MRS</span> Manager, choose <strong id="ALM-19012__b873910975611">O&M</strong> > <strong id="ALM-19012__b107441116105620">Alarm</strong> > <strong id="ALM-19012__b17457164112318">Alarms</strong>. Click this alarm and check whether <strong id="ALM-19012__b34570415314">Alarm Cause</strong> indicates unknown errors.</span><p><ul id="ALM-19012__ul174571041103114"><li id="ALM-19012__li145744114318">If yes, go to <a href="#ALM-19012__li11456104183119">4</a>.</li><li id="ALM-19012__li438316344441">If no, go to <a href="#ALM-19012__li5458941113112">2</a></li></ul>
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</p></li><li id="ALM-19012__li5458941113112"><a name="ALM-19012__li5458941113112"></a><a name="li5458941113112"></a><span>On the <span id="ALM-19012__text33473207570">MRS</span> Manager home page, choose <strong id="ALM-19012__b145724114319">O&M</strong> > <strong id="ALM-19012__b162434085717">Backup and Restoration</strong> > <strong id="ALM-19012__b15457204183113">Backup Management</strong>. Check whether there are success records of the backup task named <strong id="ALM-19012__b134570411311">default</strong> or other HBase metadata backup tasks that have been successfully executed.</span><p><ul id="ALM-19012__ul154581741103118"><li id="ALM-19012__li164573411317">If yes, go to <a href="#ALM-19012__li164581941183116">3</a>.</li><li id="ALM-19012__li1245815413317">If no, go to <a href="#ALM-19012__li11456104183119">4</a>.</li></ul>
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</p></li><li id="ALM-19012__li164581941183116"><a name="ALM-19012__li164581941183116"></a><a name="li164581941183116"></a><span>Use the latest backup metadata to restore the metadata of the HBase service. </span></li></ol>
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<p class="tableheading" id="ALM-19012__p5564114195739"><strong id="ALM-19012__b48315751195859">Collect fault information.</strong></p>
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<ol start="4" id="ALM-19012__ol24564416317"><li id="ALM-19012__li11456104183119"><a name="ALM-19012__li11456104183119"></a><a name="li11456104183119"></a><span>On the <span id="ALM-19012__text1070320217570">MRS</span> Manager page of the active and standby clusters, choose <strong id="ALM-19012__b845674115313">O&M</strong> > <strong id="ALM-19012__b645614413315">Log</strong> > <strong id="ALM-19012__b12456741123117">Download</strong>.</span></li><li id="ALM-19012__li645614153112"><span>In the <strong id="ALM-19012__b84561641133115">Service</strong> area, select faulty HBase services in the required cluster.</span></li><li id="ALM-19012__li1145664103113"><span>Click <span><img id="ALM-19012__image1945644173117" src="en-us_image_0000001532927334.png"></span> in the upper right corner, and set <strong id="ALM-19012__b6456941173117">Start Date</strong> and <strong id="ALM-19012__b11456154113318">End Date</strong> for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click <strong id="ALM-19012__b13456164113319">Download</strong>.</span></li><li id="ALM-19012__li245654113112"><span>Contact the <span id="ALM-19012__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-19012__section1529716184534"><h4 class="sectiontitle">Alarm Clearing</h4><p id="ALM-19012__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-19012__sbf8de1837d864a08a95c2656ca095639"><h4 class="sectiontitle">Related Information</h4><p id="ALM-19012__en-us_topic_0070543524_p48858863">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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