: String index out of range: 18Īt (String.java:658)Īt .classOne.getResult(classOne.java:15)Īt .AppController.tester(AppController.java:27)Īt 0(Native Method)Īt (NativeMethodAccessorImpl.java:62)Īt (DelegatingMethodAccessorImpl.java:43)Īt .invoke(Method.java:498)Īt .(InvocableHandlerMethod.java:190)Īt .(InvocableHandlerMethod.java:138) 14:51:22,299 ERROR classOne: Index out of range For example, the following is an example of a Java stack trace log written to a file without JSON: The simplest way to ensure that your multi-line logs are processed as single events is to log to JSON. Note that if you have a containerized environment, we recommend logging to STDOUT so that your orchestrator can aggregate and write them to a file. Finally, it reduces overall application overhead as your code will not be responsible for forwarding logs to a management system. Second, it means that issues with your network connectivity won’t affect your application’s ability to log events. First, it ensures that log lines are written sequentially, in the correct order. This has several benefits over other logging methods. In either case, we generally recommend that you log to a file in your environment. We will go over two primary methods for collecting and processing multi-line logs in a way that aggregates them as single events: Each line is treated as an individual log event, and it’s not even clear if the lines are being streamed in the correct order, or where a stack trace ends and a new log begins. The multi-line logging problemīelow, we can see a log stream in a log management service that includes several multi-line error logs and stack traces. In this post, we will go over strategies for handling multi-line logs so that you can use them to identify and solve problems that arise in your environment. Instead, each line is processed separately, increasing logging overhead and making it difficult to interpret your applications’ activity, since related information gets separated across disparate logs instead of appearing in a single log message. This is because, without proper configuration, log management services and tools do not treat multi-line logs as a single event. But, as anyone who has tried knows, it can be a challenge to collect stack traces and other multi-line logs so that you can easily parse, search, and use them to identify problems. Multi-line logs such as stack traces give you lots of very valuable information for debugging and troubleshooting application problems.
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