forked from docs/doc-exports
Yang, Tong
3b1f73dece
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>
73 lines
7.8 KiB
HTML
73 lines
7.8 KiB
HTML
<a name="ALM-14030"></a><a name="ALM-14030"></a>
|
|
|
|
<h1 class="topictitle1">ALM-14030 HDFS Allows Write of Single-Replica Data</h1>
|
|
<div id="body0000001432744945"><div class="section" id="ALM-14030__section8243740"><h4 class="sectiontitle">Description</h4><p id="ALM-14030__p1150154112313">This alarm is generated when <strong id="ALM-14030__b1175042715912">dfs.single.replication.enable</strong> is set to <strong id="ALM-14030__b958732912595">true</strong>, indicating that HDFS is configured to allow write of single-replica data.</p>
|
|
<p id="ALM-14030__p1931134211237">This alarm is cleared when this function is disabled on HDFS.</p>
|
|
</div>
|
|
<div class="section" id="ALM-14030__section7084804"><h4 class="sectiontitle">Attribute</h4>
|
|
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-14030__table38418539" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-14030__row53418480"><th align="left" class="cellrowborder" valign="top" width="33.33333333333333%" id="mcps1.3.2.2.1.4.1.1"><p id="ALM-14030__p31929608">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-14030__p36161432">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-14030__p43394889">Auto Clear</p>
|
|
</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody><tr id="ALM-14030__row25325122"><td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.1 "><p id="ALM-14030__p1094874635210">14030</p>
|
|
</td>
|
|
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.2 "><p id="ALM-14030__p9947546105217">Warning</p>
|
|
</td>
|
|
<td class="cellrowborder" valign="top" width="33.33333333333333%" headers="mcps1.3.2.2.1.4.1.3 "><p id="ALM-14030__p89402461522">Yes</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="ALM-14030__section63763242"><h4 class="sectiontitle">Parameters</h4>
|
|
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="ALM-14030__table3554205" frame="border" border="1" rules="all"><thead align="left"><tr id="ALM-14030__row22865724"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.1"><p id="ALM-14030__p40184376">Name</p>
|
|
</th>
|
|
<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.3.2.1.3.1.2"><p id="ALM-14030__p33709057">Meaning</p>
|
|
</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody><tr id="ALM-14030__row10137556112512"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-14030__p859219498522">Source</p>
|
|
</td>
|
|
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-14030__p2059134995215">Specifies the cluster for which the alarm is generated.</p>
|
|
</td>
|
|
</tr>
|
|
<tr id="ALM-14030__row46079102"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-14030__p1059010490521">ServiceName</p>
|
|
</td>
|
|
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-14030__p35886492524">Specifies the service for which the alarm is generated.</p>
|
|
</td>
|
|
</tr>
|
|
<tr id="ALM-14030__row63154538"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.1 "><p id="ALM-14030__p12587144965212">RoleName</p>
|
|
</td>
|
|
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.3.2.1.3.1.2 "><p id="ALM-14030__p145851849195219">Specifies the role for which the alarm is generated.</p>
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="ALM-14030__section36998271"><h4 class="sectiontitle">Impact on the System</h4><p id="ALM-14030__p16253019">Data of a single replica may be lost. Therefore, the system does not allow write of single-replica data by default. If this configuration is enabled on HDFS and the number of HDFS replicas configured on the client is 1, single-replica data can be written to HDFS.</p>
|
|
</div>
|
|
<div class="section" id="ALM-14030__section64548988"><h4 class="sectiontitle">Possible Causes</h4><p id="ALM-14030__p1681410563526">The HDFS configuration item <strong id="ALM-14030__b1986151110101">dfs.single.replication.enable</strong> is set to <strong id="ALM-14030__b1411820137105">true</strong>.</p>
|
|
</div>
|
|
<div class="section" id="ALM-14030__section682510375520"><h4 class="sectiontitle">Procedure</h4><ol id="ALM-14030__ol14734105943316"><li id="ALM-14030__li07332593335"><span>Log in to FusionInsight Manager and choose <strong id="ALM-14030__b19225112113101">Cluster</strong> > <strong id="ALM-14030__b1322662114102">Services</strong> > <strong id="ALM-14030__b1122652119109">HDFS</strong>. On the page that is displayed, click the <strong id="ALM-14030__b1622613218109">Configurations</strong> tab then the <strong id="ALM-14030__b12261921171019">All Configurations</strong> sub-tab.</span></li><li id="ALM-14030__li273318597339"><span>Search for <strong id="ALM-14030__b18878171411111">dfs.single.replication.enable</strong> in the search box, change the value of the configuration item to <strong id="ALM-14030__b6951621101119">false</strong>, and click <strong id="ALM-14030__b525192510113">Save</strong>.</span></li><li id="ALM-14030__li1773325943314"><span>On the <strong id="ALM-14030__b7940144714115">Dashboard</strong> page of the HDFS service, click <strong id="ALM-14030__b3567409127">More</strong> and select <strong id="ALM-14030__b15485820151411">Service Rolling Restart</strong> in the upper right corner.</span></li><li id="ALM-14030__li573410594337"><span>After the HDFS service is started, check whether the alarm is cleared.</span><p><ul id="ALM-14030__ul1973465916330"><li id="ALM-14030__li673395910334">If yes, no further action is required.</li><li id="ALM-14030__li77341359163313">If no, go to <a href="#ALM-14030__li5733165943316">5</a>.</li></ul>
|
|
</p></li></ol>
|
|
<p class="tableheading" id="ALM-14030__p3255143214441"><strong id="ALM-14030__b3228746141411">Collect fault information.</strong></p>
|
|
<ol start="5" id="ALM-14030__ol10733195913334"><li id="ALM-14030__li5733165943316"><a name="ALM-14030__li5733165943316"></a><a name="li5733165943316"></a><span>On FusionInsight Manager, choose <strong id="ALM-14030__b18732152131515">O&M</strong>. In the navigation pane on the left, choose <strong id="ALM-14030__b673418211510">Log</strong> > <strong id="ALM-14030__b177361723153">Download</strong>.</span></li><li id="ALM-14030__li147338592332"><span>Expand the drop-down list next to the <strong id="ALM-14030__b15258191011512">Service</strong> field. In the <strong id="ALM-14030__b2258151015151">Services</strong> dialog box that is displayed, select <strong id="ALM-14030__b125901013158">HDFS</strong> for the target cluster.</span></li><li id="ALM-14030__li7733125910338"><span>Click <span><img id="ALM-14030__image14733135983315" src="en-us_image_0000001383088002.png"></span> in the upper right corner, and set <strong id="ALM-14030__b1462532451517">Start Date</strong> and <strong id="ALM-14030__b56251324151512">End Date</strong> for log collection to 10 minutes ahead of and after the alarm generation time, respectively. Then, click <strong id="ALM-14030__b962517241150">Download</strong>.</span></li><li id="ALM-14030__li17331559123319"><span>Contact <span id="ALM-14030__text115775919168">O&M personnel</span> and provide the collected logs.</span></li></ol>
|
|
</div>
|
|
<div class="section" id="ALM-14030__section169311343318"><h4 class="sectiontitle">Alarm Clearing</h4><p id="ALM-14030__p754913417333">This alarm is automatically cleared after the fault is rectified.</p>
|
|
</div>
|
|
<div class="section" id="ALM-14030__section61085563"><h4 class="sectiontitle">Related Information</h4><p id="ALM-14030__p11393601">None</p>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="mrs_01_1298.html">Alarm Reference (Applicable to MRS 3.x)</a></div>
|
|
</div>
|
|
</div>
|
|
|