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jvm-threadz provides information about all the JVM threads running in an Impalad/Catalogd. Currently, this relies on ThreadInfo.toString() for a text representation of the thread information and stack. This output only contains the first few frames, which can be an issue for deeper stacks (e.g. the Catalog talking to HMS via Thrift). The output does contain useful non-stacktrace information like what lock the thread is waiting on. This keeps the first line of the ThreadInfo.toString() output that contains non-stacktrace information. Then it walks through the StackTraceElements from ThreadInfo.getStackTrace() and adds the full stack string. This is intended to mimic the jstack output (with indentation and "at"). To avoid licensing issues, I have not looked at any of the OpenJDK code (which is GPL 2.0) or any of the previous attempts at solving this issue (which consulted OpenJDK code). To make the stacks display correctly in the WebUI page, this puts the thread information in a <span> with "white-space: pre-wrap", which respects the newlines in the original output. Testing: - gdb attached to the HMS and then issued a select in impala-shell to force a metadata load. Then, looked at the catalogd /jvm-threadz page to see the longer stacks. Change-Id: I6730336600a8130e6452c682bcf249cac528ceee Reviewed-on: http://gerrit.cloudera.org:8080/19632 Reviewed-by: Wenzhe Zhou <wzhou@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com> Reviewed-by: Quanlong Huang <huangquanlong@gmail.com>
68 lines
1.8 KiB
Cheetah
68 lines
1.8 KiB
Cheetah
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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-->
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{{> www/common-header.tmpl }}
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{{> www/threadz_tabs.tmpl }}
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<h3>JVM Threads</h3>
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{{#overview}}
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<h3>Total: {{thread_count}}, Daemon: {{daemon_count}}, Peak: {{peak_count}}</h3>
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{{/overview}}
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<table id="java-threads-tbl" class='table table-hover table-bordered'>
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<thead>
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<tr>
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<th>Summary</th>
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<th>CPU time (s)</th>
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<th>User time (s)</th>
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<th>Blocked time (ms)</th>
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<th>Blocked times</th>
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<th>Native</th>
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</tr>
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</thead>
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<tbody>
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{{#jvm-threads}}
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<tr>
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<td><span style="white-space: pre-wrap;">{{summary}}</span></td>
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<td>{{cpu_time_sec}}</td>
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<td>{{user_time_sec}}</td>
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<td>{{blocked_time_ms}}</td>
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<td>{{blocked_count}}</td>
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<td>{{is_native}}</td>
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</tr>
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{{/jvm-threads}}
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</tbody>
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</table>
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<script>
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$(document).ready(function() {
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$('#java-threads-tbl').DataTable({
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"order": [[ 1, "asc" ]],
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"pageLength": 100
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});
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});
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</script>
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<script>
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$("#jvm-tab").addClass("active");
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</script>
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{{> www/common-footer.tmpl }}
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