error-handling

问题 I need to use NSTask synchronously, however I find that occasionally my task hangs under the 'waitUntilExit' command. I wonder if there is a graceful way--an error handling method--to terminated the hanging task so I can re-launch another? 回答1: Note that if the task being run via NSTask fills the output pipe then the process will hang, effectively blocking waitUntilExit from returning. You can prevent this situation by calling [task.standardOutput.fileHandleForReading readDataToEndOfFile];

问题 I was originally trying to run a Job that seemed to get stuck in a CrashBackoffLoop. Here was the service file: apiVersion: batch/v1 kind: Job metadata: name: es-setup-indexes namespace: elk-test spec: template: metadata: name: es-setup-indexes spec: containers: - name: es-setup-indexes image: appropriate/curl command: ['curl -H "Content-Type: application/json" -XPUT http://elasticsearch.elk-test.svc.cluster.local:9200/_template/filebeat -d@/etc/filebeat/filebeat.template.json'] volumeMounts:

问题 I was originally trying to run a Job that seemed to get stuck in a CrashBackoffLoop. Here was the service file: apiVersion: batch/v1 kind: Job metadata: name: es-setup-indexes namespace: elk-test spec: template: metadata: name: es-setup-indexes spec: containers: - name: es-setup-indexes image: appropriate/curl command: ['curl -H "Content-Type: application/json" -XPUT http://elasticsearch.elk-test.svc.cluster.local:9200/_template/filebeat -d@/etc/filebeat/filebeat.template.json'] volumeMounts:

问题 I'm trying to handle errors coming from my backend. The handleMessage() is called if an error occurs but the content is an instance of XmlMessage. I would like to change it to my own response - just set the response code and add some message. I haven't found any proper documentation which could tell me how to do this... These axamples are for REST but I'd like to manage this thing in SOAP too. interceptor public class ErrorHandlerInterceptor extends AbstractPhaseInterceptor<Message> { public

问题 I have a batch file that runs some SELECT queries using sqlcmd, puts the results into text files, and uploads those files onto an FTP server. That's all working just the way it should, which is how I like things to work. I've been wondering about what I would do in the event of an error, though. Let's say someone changes the data structure of the database I'm hitting and doesn't notify me. If I ran a sqlcmd SELECT statement and dropped the result into a text file, I would just end up with a

问题 I'm trying to run the following code in R, but I'm getting an error. I'm not sure what part of the formula is incorrect. Any help would be greatly appreciated. > censusdata_20$AGB93 = WD * exp(-1.239 + 1.980 * log (DIAM93) + 0.207 (log(DIAM93))^2 - 0.0281 (log(DIAM93))^3) Error: attempt to apply non-function 回答1: You're missing * s in the last two terms of your expression, so R is interpreting (e.g.) 0.207 (log(DIAM93))^2 as an attempt to call a function named 0.207 ... For example: > 1 + 2*

问题 I'm trying to run the following code in R, but I'm getting an error. I'm not sure what part of the formula is incorrect. Any help would be greatly appreciated. > censusdata_20$AGB93 = WD * exp(-1.239 + 1.980 * log (DIAM93) + 0.207 (log(DIAM93))^2 - 0.0281 (log(DIAM93))^3) Error: attempt to apply non-function 回答1: You're missing * s in the last two terms of your expression, so R is interpreting (e.g.) 0.207 (log(DIAM93))^2 as an attempt to call a function named 0.207 ... For example: > 1 + 2*

问题 I am struggling with the best way to report errors in a set of functions that should compose nicely, in a library I'm working on. Concretely, I have functions that look like: foo, bar, baz :: a -> Maybe a where foo can fail in only one way (a good fit for Maybe ), but bar and baz can fail in two different ways each (good fits for Either BarErrors and Either BazErrors ). One solution is to create: data AllTheErrors = TheFooError | BarOutOfBeer | BarBurnedDown | ... and make all the functions

问题 I am struggling with the best way to report errors in a set of functions that should compose nicely, in a library I'm working on. Concretely, I have functions that look like: foo, bar, baz :: a -> Maybe a where foo can fail in only one way (a good fit for Maybe ), but bar and baz can fail in two different ways each (good fits for Either BarErrors and Either BazErrors ). One solution is to create: data AllTheErrors = TheFooError | BarOutOfBeer | BarBurnedDown | ... and make all the functions

问题 I am writing a Molecular Dynamics code and for that I have a function that computes forces between particles: conservative, random and dissipative forces. The conservative forces are pairwise forces, which means I have a double loop for to compute them. I wanted to save some time and include the calculation of the random and dissipative forces in one of the loops of the double loop as follows: fr = np.zeros((npart, dim)) fd = np.zeros((npart, dim)) fc = np.zeros((npart, dim)) for i in range