我在 linux vm 上有弹性搜索索引。我收到以下错误，请告知如何解决。由于服务器离线并且客户端应用程序将数据推送到弹性，该索引工作正常。
我有一个托管的 appsearch 服务连接到此。下面是错误跟踪，非常感谢任何帮助。如果我手动删除索引，弹性服务将停止并出现错误。它不仅是一个索引，很少有索引有问题我使用的弹性版本是“数字”：“7.5.2”，
Caused by: java.nio.file.FileSystemException: /datadrive/data/nodes/0/indices/1x33jEA9SfavBaZavN2ksw/0/_state: Too many open
files
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:100) ~[?:?]
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) ~[?:?]
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116) ~[?:?]
at sun.nio.fs.UnixFileSystemProvider.newDirectoryStream(UnixFileSystemProvider.java:432) ~[?:?]
at java.nio.file.Files.newDirectoryStream(Files.java:543) ~[?:?]
at org.elasticsearch.gateway.MetaDataStateFormat.findMaxGenerationId(MetaDataStateFormat.java:353) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.gateway.MetaDataStateFormat.write(MetaDataStateFormat.java:222) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.gateway.MetaDataStateFormat.writeAndCleanup(MetaDataStateFormat.java:185) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.seqno.ReplicationTracker.persistRetentionLeases(ReplicationTracker.java:491) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.shard.IndexShard.persistRetentionLeases(IndexShard.java:2228) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.seqno.RetentionLeaseBackgroundSyncAction.lambda$shardOperationOnPrimary$2(RetentionLeaseBackgroundSyncAction.java:137) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.ActionListener.completeWith(ActionListener.java:285) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.seqno.RetentionLeaseBackgroundSyncAction.shardOperationOnPrimary(RetentionLeaseBackgroundSyncAction.java:133) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.seqno.RetentionLeaseBackgroundSyncAction.shardOperationOnPrimary(RetentionLeaseBackgroundSyncAction.java:58) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.support.replication.TransportReplicationAction$PrimaryShardReference.perform(TransportReplicationAction.java:917) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.support.replication.ReplicationOperation.execute(ReplicationOperation.java:108) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.runWithPrimaryShardReference(TransportReplicationAction.java:394) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.lambda$doRun$0(TransportReplicationAction.java:316) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.ActionListener$1.onResponse(ActionListener.java:63) [elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.shard.IndexShard.lambda$wrapPrimaryOperationPermitListener$22(IndexShard.java:2796) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.ActionListener$3.onResponse(ActionListener.java:113) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.shard.IndexShardOperationPermits.acquire(IndexShardOperationPermits.java:285) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.shard.IndexShardOperationPermits.acquire(IndexShardOperationPermits.java:237) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.index.shard.IndexShard.acquirePrimaryOperationPermit(IndexShard.java:2770) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.support.replication.TransportReplicationAction.acquirePrimaryOperationPermit(TransportReplicationAction.java:858) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.support.replication.TransportReplicationAction$AsyncPrimaryAction.doRun(TransportReplicationAction.java:312) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.action.support.replication.TransportReplicationAction.handlePrimaryRequest(TransportReplicationAction.java:275) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler$1.doRun(SecurityServerTransportInterceptor.java:257) ~[?:?]
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.xpack.security.transport.SecurityServerTransportInterceptor$ProfileSecuredRequestHandler.messageReceived(SecurityServerTransportInterceptor.java:315) ~[?:?]
at org.elasticsearch.transport.RequestHandlerRegistry.processMessageReceived(RequestHandlerRegistry.java:63) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.transport.TransportService$7.doRun(TransportService.java:752) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:773) ~[elasticsearch-7.5.2.jar:7.5.2]
at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-7.5.2.jar:7.5.2]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
at java.lang.Thread.run(Thread.java:830) ~[?:?]