![]() Java 17 defines 78 such errors in the SDK alone, and other projects and frameworks additionally define their own RuntimeException errors. Java contains a built-in construct to handle a class of common code-related runtime errors, called the RuntimeException, or the unchecked exception. Code often contains logical problems that cause an application to fail at runtime. Just because code compiles doesn't mean it works properly. ![]() This eliminates both underallocated resources, and the trap of purchasing expensive, rarely used hardware. Examples of such tools include JDK Flight Recorder and Java Mission Control.įor applications with completely unpredictable workloads, use cloud-based load balancing technology to allocate resources elastically. A tax service might hit a peak load before the filing deadline but have relatively little load the rest of the year.ĭevOps teams must monitor their performance metrics with tools to preemptively detect and mitigate resource-related runtime errors. For example, a financial services app may see steady load most of the time but be extremely busy at the end of trading day. Some applications' load varies drastically. If these tools detect a possible performance problem, they can stop the application before it moves further down the pipeline toward production deployment. One way to avoid resource-related runtime errors is to use a load testing tool, such as JMeter or LoadRunner, in an application's CI/CD pipeline. Examples include: network timeouts, out of memory conditions, CPU overutilization or an inability to schedule a thread on the processor. Many runtime errors in Java involve resource limitations caused by problems with the underlying infrastructure. Software developers don't shoulder the blame for every type of runtime error that occurs. Popular Java frameworks such as Apache BVal and Hibernate Validator perform simple, annotation-based input cleansing, and they integrate easily into any Java-based application. Use of such libraries helps mitigate runtime errors caused by input sanitization failures. The process of input sanitization, or data scrubbing, converts the broad spectrum of data that could potentially be entered into applications into a safe range of values that a program comprehends. This not only can cause an application to fail, but potentially surrender control of the entire data layer. ![]() More nefariously, a favorite attack vector of hackers is SQL injection, which hides a harmful executable database query inside an otherwise innocuous input field. Data cleansing provides these benefits to organizations. Similarly, text-processing systems built to expect all input in ASCII format can prematurely terminate if they receive emojis or nonstandard character inputs. On an HTML-based comment board, a user who is allowed to innocently submit an unencoded less than () has the potential to completely ruin the ability of that webpage to render. There are innumerable ways user input can corrupt an application. The most common runtime errors in Java can be broken into the following five categories: Let's take a closer look at the five most common runtime errors in Java programmers will encounter, and the steps and strategies to pursue to address them. ![]() Such a broad definition isn't very helpful when Java runtime errors stop your app in its tracks.
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