如何修復“nodetool：無法連接到'localhost：7199' - ConnectException：'連接被拒絕（連接被拒絕）'。”

Question

我安裝了 Cassandra 並且它之前工作正常，但是一旦我將 java 1.8 更新到 java 16，即使我運行，我也會收到此錯誤

systemctl status cassandra

它說找不到 Unit cassandra.service

這是 cassandra 的日志

2021-07-29 04:20:18 INFO  PropertiesUtil:65 - loadProperties - file does not exist, skipping ... /opt/apigee/customer//pod/default.properties
2021-07-29 04:20:18 INFO  PropertiesUtil:65 - loadProperties - file does not exist, skipping ... /opt/apigee/customer//pod/default.properties
2021-07-29 04:20:18 INFO  PropertiesUtil:65 - loadProperties - file does not exist, skipping ... /opt/apigee/customer//org/default.properties
2021-07-29 04:20:18 INFO  PropertiesUtil:65 - loadProperties - file does not exist, skipping ... /opt/apigee/customer//org/default.properties
2021-07-29 04:20:18 INFO  PropertiesUtil:65 - loadProperties - file does not exist, skipping ... /opt/apigee/customer//host/default.properties
2021-07-29 04:20:18 INFO  PropertiesUtil:65 - loadProperties - file does not exist, skipping ... /opt/apigee/customer//host/node-2.properties
2021-07-29 04:20:18 INFO  Tokenizer:104 - Tokenization Done
2021-07-29 04:20:18 INFO  ZipCompare:59 - Comparing /opt/apigee/data/apigee-cassandra/config_backup_20210729_042017.zip with /opt/apigee/data/apigee-cassandra/newconfig_backup_20210729_042018.zip:
2021-07-29 04:20:18 INFO  ZipCompare:111 - 19 entries matched
2021-07-29 04:20:18 INFO  ConfigUtil:74 - Removing old backup files as there is no change /opt/apigee/data/apigee-cassandra/config_backup_20210729_042017.zip

如果我運行nodetool status它會顯示nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'.

如果我使用 ```apigee-all restart`` 重新啟動服務

感謝您的任何指導或幫助

Answer 1

Cassandra 不適用於 Java 16。

Cassandra 4.0 之前的版本僅支持 Java 8。Cassandra 4.0 支持標記為“實驗性”的 Java 8 + Java 11（盡管有關於采用完全支持的積極討論）。 干杯!