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doc-exports/docs/mrs/umn/alm_14004.html
Yang, Tong 3b1f73dece MRS UMN 2.0.38.SP20 version 
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>
2022-12-13 12:03:34 +00:00

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<a name="alm_14004"></a><a name="alm_14004"></a>
<h1 class="topictitle1">ALM-14004 Number of Damaged HDFS Blocks Exceeds the Threshold</h1>
<div id="body8662426"><div class="section" id="alm_14004__en-us_topic_0191813949_section31497787"><h4 class="sectiontitle">Description</h4><p id="alm_14004__en-us_topic_0191813949_p10212927">The system checks the number of damaged blocks every 30 seconds and compares the number of damaged blocks with the threshold. The damaged blocks indicator has a default threshold. This alarm is generated when the number of damaged blocks exceeds the threshold.</p>
<p id="alm_14004__en-us_topic_0191813949_p21940722">This alarm is cleared when the number of damaged blocks is less than or equal to the threshold. You are advised to run the <strong id="alm_14004__b57181612123118">hdfs fsck /</strong> command to check whether any file is completely damaged.</p>
</div>
<div class="section" id="alm_14004__en-us_topic_0191813949_section15044627"><h4 class="sectiontitle">Attribute</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="alm_14004__en-us_topic_0191813949_table32368095" frame="border" border="1" rules="all"><thead align="left"><tr id="alm_14004__en-us_topic_0191813949_row53402119"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.1"><p id="alm_14004__en-us_topic_0191813949_p30604389">Alarm ID</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.2"><p id="alm_14004__en-us_topic_0191813949_p63036484">Alarm Severity</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.3"><p id="alm_14004__en-us_topic_0191813949_p5681612">Auto Clear</p>
</th>
</tr>
</thead>
<tbody><tr id="alm_14004__en-us_topic_0191813949_row57557412"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.1 "><p id="alm_14004__en-us_topic_0191813949_p31638772">14004</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.2 "><p id="alm_14004__en-us_topic_0191813949_p12603749">Major</p>
</td>
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.3 "><p id="alm_14004__en-us_topic_0191813949_p14270750">Yes</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="alm_14004__en-us_topic_0191813949_section1183915"><h4 class="sectiontitle">Parameters</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="alm_14004__en-us_topic_0191813949_table15080136" frame="border" border="1" rules="all"><thead align="left"><tr id="alm_14004__en-us_topic_0191813949_row66592127"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.1"><p id="alm_14004__en-us_topic_0191813949_p25253189">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.2"><p id="alm_14004__en-us_topic_0191813949_p32242465">Description</p>
</th>
</tr>
</thead>
<tbody><tr id="alm_14004__en-us_topic_0191813949_row61502840"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_14004__en-us_topic_0191813949_p15674164">ServiceName</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_14004__en-us_topic_0191813949_p61647805">Specifies the service for which the alarm is generated.</p>
</td>
</tr>
<tr id="alm_14004__en-us_topic_0191813949_row17959338"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_14004__en-us_topic_0191813949_p45420240">RoleName</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_14004__en-us_topic_0191813949_p55160823">Specifies the role for which the alarm is generated.</p>
</td>
</tr>
<tr id="alm_14004__en-us_topic_0191813949_row26685362"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_14004__en-us_topic_0191813949_p14030717">HostName</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_14004__en-us_topic_0191813949_p62746268">Specifies the host for which the alarm is generated.</p>
</td>
</tr>
<tr id="alm_14004__en-us_topic_0191813949_row27845503"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_14004__en-us_topic_0191813949_p40893240">NSName</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_14004__en-us_topic_0191813949_p24018105">Specifies the NameService service for which the alarm is generated.</p>
</td>
</tr>
<tr id="alm_14004__en-us_topic_0191813949_row14836356"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="alm_14004__en-us_topic_0191813949_p60894213">Trigger condition</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="alm_14004__en-us_topic_0191813949_p33484259">Generates an alarm when the actual indicator value exceeds the specified threshold.</p>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section" id="alm_14004__en-us_topic_0191813949_section10655236"><h4 class="sectiontitle">Impact on the System</h4><p id="alm_14004__en-us_topic_0191813949_p27870469">Data is damaged and HDFS fails to read files.</p>
</div>
<div class="section" id="alm_14004__en-us_topic_0191813949_section28788263"><h4 class="sectiontitle">Possible Causes</h4><ul id="alm_14004__en-us_topic_0191813949_ul42915540"><li id="alm_14004__en-us_topic_0191813949_li50695543">The DataNode instance is abnormal.</li><li id="alm_14004__en-us_topic_0191813949_li53606711">Data verification information is damaged.</li></ul>
</div>
<div class="section" id="alm_14004__en-us_topic_0191813949_section57767782"><h4 class="sectiontitle">Procedure</h4><ol id="alm_14004__en-us_topic_0191813949_ol199381559438"><li id="alm_14004__en-us_topic_0191813949_li572522141314"><span>Collect fault information.</span><p><ol type="a" id="alm_14004__en-us_topic_0191813949_en-us_topic_0191813935_ol6089206913036"><li id="alm_14004__en-us_topic_0191813949_en-us_topic_0191813935_li4478836213036">On MRS Manager, choose <span class="menucascade" id="alm_14004__menucascade57331944320"><b><span class="uicontrol" id="alm_14004__uicontrol1372711443212">System</span></b> &gt; <b><span class="uicontrol" id="alm_14004__uicontrol107335420321">Export Log</span></b></span>.</li><li id="alm_14004__li18574327401">Contact technical support engineers for help. For details, see <a href="https://docs.otc.t-systems.com/en-us/public/learnmore.html" target="_blank" rel="noopener noreferrer">technical support</a>.</li></ol>
</p></li></ol>
</div>
<div class="section" id="alm_14004__en-us_topic_0191813949_section50147992"><h4 class="sectiontitle">Reference</h4><p id="alm_14004__en-us_topic_0191813949_p45118907">None</p>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_0241.html">Alarm Reference (Applicable to Versions Earlier Than MRS 3.x)</a></div>
</div>
</div>
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