日志显示堆转储是在gc持久卷中创建的，但是当进入荚时没有堆转储文件。

Question

通过部署以下yml文件，我在GoogleCloud中创建了以下持久卷：

apiVersion: v1
kind: PersistentVolume
metadata:
  name: staging-filestore
  labels:
    filestore: standard
spec:
  capacity:
    storage: 1T
  accessModes:
  - ReadWriteMany
  mountOptions:
  - lookupcache=positive #Disables caching to make all writes be sync to the server
  nfs:
    path: /staging
    server: 10.64.16.130
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: staging-filestore-pvc
spec:
  selector:
    matchLabels:
      filestore: standard
  accessModes:
  - ReadWriteMany
  storageClassName: ""
  resources:
    requests:
      storage: 1T

该卷已成功创建并安装在以下服务中：

apiVersion: v1
kind: Service
metadata:
  name: demo
  labels:
    app: demo
    vendor: rs
spec:
  selector:
    app: demo
    vendor: rs
  ports:
  - port: 4010
    name: internal
    targetPort: 4010
  - port: 80
    name: external
    targetPort: 4010
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: demo
  labels:
    app: demo
    vendor: rs
spec:
  selector:
    matchLabels:
      app: demo
  replicas: 1
  revisionHistoryLimit: 2
  template:
    metadata:
      labels:
        app: demo
        vendor: rs
    spec:
      imagePullSecrets:
      - name: dockerhub-secret

      containers:

      - name: demo
        image: rs/demo:latest
        imagePullPolicy: Always
        resources:
          requests:
            memory: "1Gi"
          limits:
            memory: "2Gi"
        volumeMounts:
          - mountPath: /dumps/heap-dump
            name: dumpstorage
        readinessProbe:
          httpGet:
            path: /_health
            port: http
          initialDelaySeconds: 5
          periodSeconds: 5
          failureThreshold: 5
        livenessProbe:
          httpGet:
            path: /_health
            port: http
          initialDelaySeconds: 25
          periodSeconds: 5
          failureThreshold: 10
        envFrom:
        - configMapRef:
            name: rs-config
        env:
        - name: JAVA_TOOL_OPTIONS
          value: " -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=\"/dumps/demo-heap-dump\""
        ports:
        - containerPort: 4010
          name: http
      volumes:
        - name: dumpstorage
          persistentVolumeClaim:
            claimName: staging-filestore-PVC
            readOnly: false

我希望当应用程序存储内存溢出错误时生成的堆转储和暂存-filestore-PVC卷。为了测试这一点，我使用-Xmx16m选项将堆大小设置为1MB。应用程序崩溃也会导致吊舱崩溃。我从日志中可以看到，堆转储是创建的：

2022-08-08 15:34:55.767 CESTDumping heap to /dumps/demo-heap-dump ...
2022-08-08 15:34:55.990 CESTHeap dump file created [26757864 bytes in 0.223 secs]

我再次使用-Xmx1G选项部署服务yml文件。然后用命令kubectl exec -it demo-77f84d9957-vxrsz -- sh在pod终端中输入，转到/dumps目录中，没有演示堆转储文件。

​

我很难理解为什么文件不存在，尽管没有抛出错误，日志显示文件是创建的。谢谢你的帮助。

你好，兰多。

Answer 1

尝试：

...
env:
- name: JAVA_TOOL_OPTIONS
  value: " -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=\"/dumps/heap-dump\""  # <-- update the path
...