如何在 solr 云中拆分 solr 分片

Question

我在 solrCloud 模式下使用 solr 4.10.3。我有一个碎片和 3 个副本。外部 zookeeper ensemble 正在使用中。我在一个索引中的文档增加了太多。现在我想创建更多的分片。我尝试使用

http://localhost:8983/solr/admin/collections?action=SPLITSHARD&collection=collection1&shard=shard1

但它给出了以下错误

Error executing split operation for collection: collection1 parent shard: shard1
java.lang.NullPointerException
    at org.apache.solr.cloud.OverseerCollectionProcessor.splitShard(OverseerCollectionProcessor.java:1288)
    at org.apache.solr.cloud.OverseerCollectionProcessor.processMessage(OverseerCollectionProcessor.java:563)
    at org.apache.solr.cloud.OverseerCollectionProcessor$Runner.run(OverseerCollectionProcessor.java:2629)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Collection: collection1 operation: splitshard failed:org.apache.solr.common.SolrException
    at org.apache.solr.cloud.OverseerCollectionProcessor.splitShard(OverseerCollectionProcessor.java:1569)
    at org.apache.solr.cloud.OverseerCollectionProcessor.processMessage(OverseerCollectionProcessor.java:563)
    at org.apache.solr.cloud.OverseerCollectionProcessor$Runner.run(OverseerCollectionProcessor.java:2629)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
    at org.apache.solr.cloud.OverseerCollectionProcessor.splitShard(OverseerCollectionProcessor.java:1288)
null:org.apache.solr.common.SolrException
null:org.apache.solr.common.SolrException
    at org.apache.solr.handler.admin.CollectionsHandler.handleResponse(CollectionsHandler.java:364)
    at org.apache.solr.handler.admin.CollectionsHandler.handleSplitShardAction(CollectionsHandler.java:606)
    at org.apache.solr.handler.admin.CollectionsHandler.handleRequestBody(CollectionsHandler.java:172)
    at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)

问题出在哪里，问题出在哪里？

Answer 1

只有在第一次启动集群时定义了 -DnumShards=(some value) 时，才能使用属性 SPLITSHARD。