solr查詢數(shù)據(jù)時(shí)候報(bào)錯(cuò)，去服務(wù)器查看該節(jié)點(diǎn)日志?

{"responseHeader":{"status":503,"QTime":3,"params":{"q":"*:*","_":"1576753724528"}},"error":{"metadata":["error-class","org.apache.solr.common.SolrException","root-error-class","org.apache.solr.common.SolrException"],"msg":"no servers hosting shard: shard29","code":503}}

?no servers hosting shard: shard29

說(shuō)明某一個(gè)分片數(shù)據(jù)無(wú)法查詢，增大副本數(shù)，可以保證集群高可用；

如果副本為1的話，該分片掛掉，則無(wú)法提供服務(wù)；副本為2的話，未掛掉的副本將提供服務(wù)

Solr 日志如下?

Caused by: org.apache.solr.common.SolrException: Index dir 'hdfs://nameservice1/solr/_user_index_prd/core_node19/data/index/' of core '_user_index_prd_shard19_replica_n1' is already locked. The most likely cause is another Solr server (or another solr core in this server) also configured to use this directory; other possible causes may be specific to lockType: hdfsat org.apache.solr.core.SolrCore.<init>(SolrCore.java:1002)at org.apache.solr.core.SolrCore.<init>(SolrCore.java:846)at org.apache.solr.core.CoreContainer.createFromDescriptor(CoreContainer.java:1011)at org.apache.solr.core.CoreContainer.lambda$load$11(CoreContainer.java:622)at com.codahale.metrics.InstrumentedExecutorService$InstrumentedCallable.call(InstrumentedExecutorService.java:197)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at org.apache.solr.common.util.ExecutorUtil$MDCAwareThreadPoolExecutor.lambda$execute$0(ExecutorUtil.java:188)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)... 1 more Caused by: org.apache.lucene.store.LockObtainFailedException: Index dir 'hdfs://nameservice1/solr/_user_index_prd/core_node19/data/index/' of core '_user_index_prd_shard19_replica_n1' is already locked. The most likely cause is another Solr server (or another solr core in this server) also configured to use this directory; other possible causes may be specific to lockType: hdfsat org.apache.solr.core.SolrCore.initIndex(SolrCore.java:728)at org.apache.solr.core.SolrCore.<init>(SolrCore.java:948)... 9 more

服務(wù)異常退出，去hdfs文件系統(tǒng)刪除文件鎖?write.lock

hive> dfs -ls hdfs://nameservice1/solr/_user_index/core_node7/data/index/*.lock; -rw-r--r-- 2 solr solr 0 2019-12-17 14:52 hdfs://nameservice1/solr/_user_index/core_node7/data/index/write.lock hive> dfs -rm hdfs://nameservice1/solr/_user_index/core_node7/data/index/*.lock;

刪除完成后重啟該節(jié)點(diǎn)，解決?

?

總結(jié)

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