Elasticsearch6.4专题之杂记:遇到的异常与解决方案2_fatal error on the network layer

11、lucene.util.BytesRefHash$MaxBytesLengthExceededException: bytes can be at most 32766 in length; got 56965
解决方案
设置keyword字段的ignore_above为32765

12、[ERROR][o.e.a.b.TransportBulkAction] [node-1] failed to execute pipeline for a bulk request
org.elasticsearch.common.util.concurrent.EsRejectedExecutionException: rejected execution of org.elasticsearch.ingest.PipelineExecutionService$1@595ce9cf on EsThreadPoolExecutor[name = node-1/write, qu
eue capacity = 200, org.elasticsearch.common.util.concurrent.EsThreadPoolExecutor@265961ac[Running, pool size = 15, active threads = 15, queued tasks = 200, completed tasks = 15649647]]
数据提交的速度太快，而elastic search索引（落盘）不过来。
解决方案：
调整线程池大小

13、node validation exception
[1] bootstrap checks failed
[1]: system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk
系统空间不足导致

14、[ERROR][o.e.t.n.Netty4Utils ] fatal error on the network layer
[2020-01-30T12:49:26,680][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-1] fatal error in thread [Thread-229
0595], exiting
java.lang.OutOfMemoryError: Java heap space
内存不足
解决方案：分几种情况
1、如果每个索引的数据量不大，同时设置和数据量不匹配的分片（分片数过多），每一个分片都是一个独立且完整的lucene索引，所以需要调整索引的分片数，减少索引的分片数
2、如果内存充足的情况下增加内存，或者扩展集群
3、上述都无法操作时，可以适当关闭一些时间比较久远的索引，减少内存占用。

15、unable to load JNA native support library, native methods wi
ll be disabled.
java.lang.UnsatisfiedLinkError: Failed to create temporary file for /com/sun/jna/linux-x86-64/libjnidispatch.so library:
No space left on device
系统空间不足导致