即時解析錯誤（無法從TemporalAccessor獲取Instant）

Question

運行我的程序后，我發現這個奇怪的崩潰發生在大約2小時的運行后，說它無法解析日期。

Text '2016-10-26T12:31:39.084726218Z' could not be parsed: Unable to obtain Instant from TemporalAccessor: {InstantSeconds=1477485099, NanoOfSecond=84726218},ISO of type java.time.format.Parsed
at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1919)

有誰知道它為什么會這樣？ 從網上看，我發現它可能是由於格式不正確，但由於我沒有指定格式，因此對我來說並非如此。

解析我的時間戳的代碼如下：

Instant instant = Instant.parse(cAdvisor.getTimestamp());
Long epoch = instant.getEpochSecond();

注意： cAdvisor.getTimestamp()方法返回一個字符串，例如： '2016-10-26T12:31:39.084726218Z'

注2：我的java版報告了這一點

java version "1.8.0-ea"
Java(TM) SE Runtime Environment (build 1.8.0-ea-b115)
Java HotSpot(TM) 64-Bit Server VM (build 25.0-b57, mixed mode)

更新＃1：以下代碼復制此問題：

import java.time.Instant;
import java.util.Random;

// one class needs to have a main() method
public class Test
{
    // arguments are passed using the text field below this editor
    public static void main(String[] args)
    {
        Random rand = new Random();
        for (int i = 0; i < 100000; i++) {
            String date = "2016-10-26T12:31:39.0847";

            for (int j = 0; j < rand.nextInt(6); j++) {
                date += rand.nextInt(10);
            }

            date += "Z";

            date = date.replace("26", "" + (rand.nextInt(20) + 10));


            Instant instant = Instant.parse(date);
            Long epoch = instant.getEpochSecond();
            System.out.println(epoch);
        }
    }
}

這會產生以下堆棧跟蹤

Exception in thread "main" java.time.format.DateTimeParseException: Text '2016-10-27T12:31:39.0847Z' could not be parsed: Unable to obtain Instant from TemporalAccessor: {InstantSeconds=1477571499, NanoOfSecond=84700000},ISO of type java.time.format.Parsed
        at java.time.format.DateTimeFormatter.createError(DateTimeFormatter.java:1919)
        at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1854)
        at java.time.Instant.parse(Instant.java:392)
        at Test.main(Test.java:23)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:483)
        at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
        Caused by: java.time.DateTimeException: Unable to obtain Instant from TemporalAccessor: {InstantSeconds=1477571499, NanoOfSecond=84700000},ISO of type java.time.format.Parsed
        at java.time.Instant.from(Instant.java:375)
        at java.time.Instant$$Lambda$7/1018081122.queryFrom(Unknown Source)
        at java.time.format.Parsed.query(Parsed.java:226)
        at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1850)
        ... 7 more

Answer 1

對於有這個問題的其他人，有人指出這個bug的起源在於mac上過時的java版本。

要升級此版本，我安裝了最新的JDK： http ： //www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html 。 但是，安裝此文件后，舊文件夾不會更新，需要手動更新。

為此，請導航到： /Library/Java/JavaVirtualMachines/ ，您將看到包含jdk 1.8.0的兩個不同目錄，一個名為jdk1.8.0.jdk的目錄和一個名為jdk1.8.0_<version>.jdk ，其中版本為版本號（例如111）。

現在繼續刪除名為jdk1.8.0.jdk的目錄（或將其移動到_old文件夾）並使用sudo ln -s jdk1.8.0_<version>.jdk jdk1.8.0.jdk創建指向新目錄的符號鏈接

這解決了我的完整問題，現在錯誤不再出現了。 非常感謝@assylias和@ basil-bourque提出的導致此解決方案的建議。

Answer 2

您似乎在本地JVM ， IDE或操作系統上存在本地問題。 我建議您刪除並重新安裝IDE和所有 JVM。

在我的電腦上運行

我運行以下代碼，循環次數為十次（一百萬次），沒有任何問題，沒有錯誤。 我在MacBook Pro Retina上的macOS El Capitan上使用NetBeans 8.2中的Java 8 Update 111（2013年末）。

import java.time.Instant;
import java.util.Random;

public class InstantCrash {

    // arguments are passed using the text field below this editor
    public static void main ( String[] args ) {
        Random rand = new Random ();
        for ( int i = 0 ; i < 1_000_000 ; i ++ ) {
            String date = "2016-10-26T12:31:39.0847";

            for ( int j = 0 ; j < rand.nextInt ( 6 ) ; j ++ ) {
                date += rand.nextInt ( 10 );
            }

            date += "Z";

            date = date.replace ( "26" , "" + ( rand.nextInt ( 20 ) + 10 ) );

            Instant instant = Instant.parse ( date );
            Long epoch = instant.getEpochSecond ();
            System.out.println ( epoch );
        }
    }
}

在IdeOne.com運行

查看在IdeOne.com上成功運行的代碼的略微修改版本。

import java.util.*;
import java.lang.*;
import java.io.*;
import java.time.Instant;
import java.util.Random;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
       System.out.println( "Starting at: " + Instant.now() );
       Random rand = new Random();
       for (int i = 0; i < 1_000_000; i++) {
            String date = "2016-10-26T12:31:39.0847";

            for (int j = 0; j < rand.nextInt(6); j++) {
                date += rand.nextInt(10);
            }

            if( ( i % 100_000 ) == 0 ) {
                System.out.println( "So far: " + i + " | date: " + date ) ;
            }

            date += "Z";
            date = date.replace("26", "" + (rand.nextInt(20) + 10));

            Instant instant = Instant.parse(date);
            Long epoch = instant.getEpochSecond();
            // System.out.println(epoch);  // Exceeds limit of IdeOne.com.
        }
        System.out.println( "Done. Now: " + Instant.now() );
    }
}

跑步時

Starting at: 2016-10-30T00:46:34.439Z
So far: 0 | date: 2016-10-26T12:31:39.08476
So far: 100000 | date: 2016-10-26T12:31:39.08478
So far: 200000 | date: 2016-10-26T12:31:39.08475
So far: 300000 | date: 2016-10-26T12:31:39.0847827
So far: 400000 | date: 2016-10-26T12:31:39.0847
So far: 500000 | date: 2016-10-26T12:31:39.0847
So far: 600000 | date: 2016-10-26T12:31:39.0847
So far: 700000 | date: 2016-10-26T12:31:39.084709
So far: 800000 | date: 2016-10-26T12:31:39.0847865
So far: 900000 | date: 2016-10-26T12:31:39.084748
Done. Now: 2016-10-30T00:46:37.698Z