**更新据我所知，在主机上完成的删除和重建提交会被缓存，然后当索引被复制到另一台机器并重新启动 solr 时，它会以某种方式在某处找到那些缓存的提交并在启动时运行它们。这对我们很不利，因为 solr 在重做那些缓存的提交时被冲洗掉了。
如何禁用它？
**原来的
我们最近从 Solr 3 更改为 Solr 8。
索引建立在一台机器上，然后复制到另外 4 台机器上。
这是一个“静态”产品列表。大约一周一次，我们在机器 1 上删除并重建索引并复制到其他机器，然后在这些机器上重新启动 solr。在重建之间不修改（添加或删除）索引。
使用 Solr 3，当我们在复制新索引后重新启动 Solr 时，一切都会按预期工作。它只会使用我们复制过来的索引。
现在使用 Solr 8，我们发现重新启动其他机器会导致 DirectUpdateHandler2/LogUpdateProcessorFactory “从索引中删除所有文档”，执行提交并发送删除查询。
这永远不会在构建索引的机器上发生，只有索引被复制到的从机。
我们认为在我们的情况下不需要复制，因为索引保持静态，而且我们将索引同步到其他机器更简单。
我无法在 solrconfig.xml 中找到需要更改的内容，以防止它在启动时发送 deleteByQuery。似乎只有在我们上次重建索引后已经过去了足够的时间时才这样做。
这在配置中是空的：
<updateHandler class="solr.DirectUpdateHandler2">
</updateHandler>
**这并没有什么不同我只是添加了这个希望它会有所作为：
<deletionPolicy class="solr.SolrDeletionPolicy">
<!-- The number of commit points to be kept -->
<str name="maxCommitsToKeep">1</str>
<!-- The number of optimized commit points to be kept -->
<str name="maxOptimizedCommitsToKeep">0</str>
<!--
Delete all commit points once they have reached the given age.
Supports DateMathParser syntax e.g.
-->
<!--
<str name="maxCommitAge">30MINUTES</str>
<str name="maxCommitAge">1DAY</str>
-->
</deletionPolicy>
Solr 在本地运行，而不是在云模式下运行。我不使用 /bin/solr 文件来启动/停止。我有一个启动它的 rc.d。
以下是相关的 solr 日志。看起来它执行删除查询然后将它们添加回来但索引文件夹保持为空？
INFO (searcherExecutor-11-thread-1-processing-x:core0) [ x:core0] o.a.s.c.SolrCore [core0] Registered new searcher Searcher@42dff6af[core0] main{ExitableDirectoryReader(UninvertingDirectoryReader(Uninverting(_6j(8.0.0):C26532:[diagnostics={java.runtime.version=1.8.0_202-b08, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os=FreeBSD, os.arch=amd64, os.version=12.0-RELEASE-p3, source=flush, timestamp=1557748786052}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6k(8.0.0):C27135:[diagnostics={java.runtime.version=1.8.0_202-b08, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os=FreeBSD, os.arch=amd64, os.version=12.0-RELEASE-p3, source=flush, timestamp=1557748821980}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6l(8.0.0):C25295:[diagnostics={java.runtime.version=1.8.0_202-b08, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os=FreeBSD, os.arch=amd64, os.version=12.0-RELEASE-p3, source=flush, timestamp=1557748857211}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6m(8.0.0):C18995:[diagnostics={java.runtime.version=1.8.0_202-b08, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os=FreeBSD, os.arch=amd64, os.version=12.0-RELEASE-p3, source=flush, timestamp=1557748884975}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}])))}
INFO (qtp349420578-20) [ x:core0] o.a.s.u.DirectUpdateHandler2 [core0] REMOVING ALL DOCUMENTS FROM INDEX
INFO (qtp349420578-20) [ x:core0] o.a.s.u.DirectUpdateHandler2 start commit{,optimize=false,openSearcher=true,waitSearcher=true,expungeDeletes=false,softCommit=false,prepareCommit=false}
INFO (qtp349420578-20) [ x:core0] o.a.s.u.SolrIndexWriter Calling setCommitData with IW:org.apache.solr.update.SolrIndexWriter@29a2d524 commitCommandVersion:0
INFO (qtp349420578-20) [ x:core0] o.a.s.s.SolrIndexSearcher Opening [Searcher@2613a525[core0] main]
INFO (qtp349420578-20) [ x:core0] o.a.s.u.DirectUpdateHandler2 end_commit_flush
INFO (searcherExecutor-11-thread-1-processing-x:core0) [ x:core0] o.a.s.c.QuerySenderListener QuerySenderListener sending requests to Searcher@2613a525[core0] main{ExitableDirectoryReader(UninvertingDirectoryReader())}
INFO (searcherExecutor-11-thread-1-processing-x:core0) [ x:core0] o.a.s.c.QuerySenderListener QuerySenderListener done.
INFO (searcherExecutor-11-thread-1-processing-x:core0) [ x:core0] o.a.s.c.SolrCore [core0] Registered new searcher Searcher@2613a525[core0] main{ExitableDirectoryReader(UninvertingDirectoryReader())}
INFO (qtp349420578-20) [ x:core0] o.a.s.u.p.LogUpdateProcessorFactory [core0] webapp=/solr path=/update params={commit=true}{deleteByQuery=*:*,commit=} 0 145
INFO (qtp349420578-14) [ x:core1] o.a.s.u.DirectUpdateHandler2 [core1] REMOVING ALL DOCUMENTS FROM INDEX
INFO (qtp349420578-14) [ x:core1] o.a.s.u.DirectUpdateHandler2 start commit{,optimize=false,openSearcher=true,waitSearcher=true,expungeDeletes=false,softCommit=false,prepareCommit=false}
INFO (qtp349420578-14) [ x:core1] o.a.s.u.SolrIndexWriter Calling setCommitData with IW:org.apache.solr.update.SolrIndexWriter@42e13429 commitCommandVersion:0
INFO (qtp349420578-14) [ x:core1] o.a.s.s.SolrIndexSearcher Opening [Searcher@3dc3e12[core1] main]
INFO (qtp349420578-14) [ x:core1] o.a.s.u.DirectUpdateHandler2 end_commit_flush
INFO (searcherExecutor-10-thread-1-processing-x:core1) [ x:core1] o.a.s.c.QuerySenderListener QuerySenderListener sending requests to Searcher@3dc3e12[core1] main{ExitableDirectoryReader(UninvertingDirectoryReader())}
INFO (searcherExecutor-10-thread-1-processing-x:core1) [ x:core1] o.a.s.c.QuerySenderListener QuerySenderListener done.
INFO (searcherExecutor-10-thread-1-processing-x:core1) [ x:core1] o.a.s.c.SolrCore [core1] Registered new searcher Searcher@3dc3e12[core1] main{ExitableDirectoryReader(UninvertingDirectoryReader())}
INFO (qtp349420578-14) [ x:core1] o.a.s.u.p.LogUpdateProcessorFactory [core1] webapp=/solr path=/update params={commit=true}{deleteByQuery=*:*,commit=} 0 24
INFO (qtp349420578-16) [ x:core0] o.a.s.u.DirectUpdateHandler2 start commit{,optimize=false,openSearcher=true,waitSearcher=true,expungeDeletes=false,softCommit=false,prepareCommit=false}
INFO (qtp349420578-16) [ x:core0] o.a.s.u.SolrIndexWriter Calling setCommitData with IW:org.apache.solr.update.SolrIndexWriter@29a2d524 commitCommandVersion:0
INFO (qtp349420578-16) [ x:core0] o.a.s.s.SolrIndexSearcher Opening [Searcher@8c5c9e1[core0] main]
INFO (qtp349420578-16) [ x:core0] o.a.s.u.DirectUpdateHandler2 end_commit_flush
INFO (searcherExecutor-11-thread-1-processing-x:core0) [ x:core0] o.a.s.c.QuerySenderListener QuerySenderListener sending requests to Searcher@8c5c9e1[core0] main{ExitableDirectoryReader(UninvertingDirectoryReader(Uninverting(_70(8.0.0):C60051:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, mergeMaxNumSegments=-1, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=merge, mergeFactor=10, os.version=12.0-RELEASE-p3, timestamp=1557766812128}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6o(8.0.0):C6151:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766730928}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6q(8.0.0):C6010:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766748246}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6z(8.0.0):C6622:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766821254}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_71(8.0.0):C5449:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766829833}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_72(8.0.0):C5439:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766837529}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_73(8.0.0):C5187:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766845144}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_74(8.0.0):C3048:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766849549}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}])))}
INFO (searcherExecutor-11-thread-1-processing-x:core0) [ x:core0] o.a.s.c.QuerySenderListener QuerySenderListener done.
INFO (searcherExecutor-11-thread-1-processing-x:core0) [ x:core0] o.a.s.c.SolrCore [core0] Registered new searcher Searcher@8c5c9e1[core0] main{ExitableDirectoryReader(UninvertingDirectoryReader(Uninverting(_70(8.0.0):C60051:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, mergeMaxNumSegments=-1, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=merge, mergeFactor=10, os.version=12.0-RELEASE-p3, timestamp=1557766812128}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6o(8.0.0):C6151:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766730928}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6q(8.0.0):C6010:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766748246}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_6z(8.0.0):C6622:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766821254}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_71(8.0.0):C5449:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766829833}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_72(8.0.0):C5439:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766837529}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_73(8.0.0):C5187:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766845144}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_74(8.0.0):C3048:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766849549}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}])))}
INFO (qtp349420578-16) [ x:core0] o.a.s.u.p.LogUpdateProcessorFactory [core0] webapp=/solr path=/update params={commit=true}{add=[1, 3, 4, 5, 6, 7, 8, 12, 13, 17, ... (97957 adds)],commit=} 0 140797
INFO (qtp349420578-20) [ x:core1] o.a.s.u.DirectUpdateHandler2 start commit{,optimize=false,openSearcher=true,waitSearcher=true,expungeDeletes=false,softCommit=false,prepareCommit=false}
INFO (qtp349420578-20) [ x:core1] o.a.s.u.SolrIndexWriter Calling setCommitData with IW:org.apache.solr.update.SolrIndexWriter@42e13429 commitCommandVersion:0
INFO (qtp349420578-20) [ x:core1] o.a.s.s.SolrIndexSearcher Opening [Searcher@4f2f2289[core1] main]
INFO (qtp349420578-20) [ x:core1] o.a.s.u.DirectUpdateHandler2 end_commit_flush
INFO (searcherExecutor-10-thread-1-processing-x:core1) [ x:core1] o.a.s.c.QuerySenderListener QuerySenderListener sending requests to Searcher@4f2f2289[core1] main{ExitableDirectoryReader(UninvertingDirectoryReader(Uninverting(_1e(8.0.0):C6778:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766860399}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_1f(8.0.0):C6493:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766868779}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_1g(8.0.0):C5931:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766877352}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_1h(8.0.0):C2786:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766881149}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}])))}
INFO (searcherExecutor-10-thread-1-processing-x:core1) [ x:core1] o.a.s.c.QuerySenderListener QuerySenderListener done.
INFO (searcherExecutor-10-thread-1-processing-x:core1) [ x:core1] o.a.s.c.SolrCore [core1] Registered new searcher Searcher@4f2f2289[core1] main{ExitableDirectoryReader(UninvertingDirectoryReader(Uninverting(_1e(8.0.0):C6778:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766860399}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_1f(8.0.0):C6493:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766868779}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_1g(8.0.0):C5931:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766877352}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}]) Uninverting(_1h(8.0.0):C2786:[diagnostics={os=FreeBSD, java.vendor=Oracle Corporation, java.version=1.8.0_202, java.vm.version=25.202-b08, lucene.version=8.0.0, os.arch=amd64, java.runtime.version=1.8.0_202-b08, source=flush, os.version=12.0-RELEASE-p3, timestamp=1557766881149}]:[attributes={Lucene50StoredFieldsFormat.mode=BEST_SPEED}])))}
INFO (qtp349420578-20) [ x:core1] o.a.s.u.p.LogUpdateProcessorFactory [core1] webapp=/solr path=/update params={commit=true}{add=[378, 462, 616, 649, 819, 849, 857, 869, 880, 968, ... (21988 adds)],commit=} 0 29390