【发布时间】：2017-11-21 18:23:38
【问题描述】：
我遇到了 Cassandra 的问题，每当我尝试启动 Cassandra 时，我都会收到打开文件过多的错误。
我已将文件描述符增加到1000000，仍然是同样的错误。
[更新]
我查看了调试日志，一开始它打开了许多 sstables。这是日志
调试 [SSTableBatchOpen:2] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-159921-big（60 字节） 调试 [SSTableBatchOpen:1] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-166961-big（49 字节） 调试 [SSTableBatchOpen:4] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-181150-big（57 字节） 调试 [SSTableBatchOpen:3] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-188190-big（49 字节） 调试 [SSTableBatchOpen:2] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-173741-big（54 字节） 调试 [SSTableBatchOpen:1] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-159987-big（45 字节） 调试 [SSTableBatchOpen:3] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-167027-big（49 字节） 调试 [SSTableBatchOpen:4] 2017-06-20 11:03:40,635 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-198208-big（53 字节） 调试 [SSTableBatchOpen:1] 2017-06-20 11:03:40,636 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-177001-big（48 字节） 调试 [SSTableBatchOpen:2] 2017-06-20 11:03:40,636 SSTableReader.java:479 - 打开 /cassandra/cass/data/system/IndexInfo-9f5c6374d48532299a0a5094af9ad1e3/mc-184041-big (57 bytes 以下是系统日志：
ERROR [SSTableBatchOpen:1] 2017-06-19 19:08:40,175 CassandraDaemon.java:205 - Exception in thread Thread[SSTableBatchOpen:1,5,main]
java.lang.RuntimeException: java.io.FileNotFoundException: /cassandra/cass/data/crownit/activitylog-60fcc250bc7211e6995a87b62bcc4eac/.controller_idx/mc-1033-big-CompressionInfo.db (Too many open files)
at org.apache.cassandra.io.compress.CompressionMetadata.<init>(CompressionMetadata.java:127) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.compress.CompressionMetadata.create(CompressionMetadata.java:91) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.util.CompressedSegmentedFile$Builder.metadata(CompressedSegmentedFile.java:125) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.util.CompressedSegmentedFile$Builder.complete(CompressedSegmentedFile.java:132) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.util.SegmentedFile$Builder.complete(SegmentedFile.java:177) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.util.SegmentedFile$Builder.buildData(SegmentedFile.java:193) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.sstable.format.SSTableReader.load(SSTableReader.java:745) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.sstable.format.SSTableReader.load(SSTableReader.java:706) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:492) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.sstable.format.SSTableReader.open(SSTableReader.java:375) ~[apache-cassandra-3.0.9.jar:3.0.9]
at org.apache.cassandra.io.sstable.format.SSTableReader$4.run(SSTableReader.java:534) ~[apache-cassandra-3.0.9.jar:3.0.9]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_101]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_101]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_101]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_101]
Caused by: java.io.FileNotFoundException: /cassandra/cass/data/crownit/activitylog-60fcc250bc7211e6995a87b62bcc4eac/.controller_idx/mc-1033-big-CompressionInfo.db (Too many open files)
at java.io.FileInputStream.open0(Native Method) ~[na:1.8.0_101]
at java.io.FileInputStream.open(FileInputStream.java:195) ~[na:1.8.0_101]
at java.io.FileInputStream.<init>(FileInputStream.java:138) ~[na:1.8.0_101]
at java.io.FileInputStream.<init>(FileInputStream.java:93) ~[na:1.8.0_101]
at org.apache.cassandra.io.compress.CompressionMetadata.<init>(CompressionMetadata.java:100) ~[apache-cassandra-3.0.9.jar:3.0.9]
... 15 common frames omitted
ERROR [SSTableBatchOpen:1] 2017-06-19 19:08:40,177 JVMStabilityInspector.java:140 - JVM state determined to be unstable. Exiting forcefully due to:
java.io.FileNotFoundException: /cassandra/cass/data/crownit/activitylog-60fcc250bc7211e6995a87b62bcc4eac/.controller_idx/mc-1033-big-CompressionInfo.db (Too many open files)
【问题讨论】：
-
检查此文件是否存在
/cassandra/cass/data/crownit/activitylog-60fcc250bc7211e6995a87b62bcc4eac/.controller_idx/mc-1033-big-CompressionInfo.db -
文件存在
-
@Arvind 似乎是 java 错误而不是 cassendra ： 1. 尝试重新启动您的机器，以释放空间。 2. 如果，不关注 1.尝试杀死你的本地 java 线程并重新启动你的 IDE 3.stackoverflow.com/questions/13706409/… 签出更新 ulimit 的链接。我遇到了同样的错误，我重新启动工作正常。
-
15GB 空间可用，我已尝试重新启动机器，但对我不起作用。我已经增加了 Ulimit。