GL_OUT_OF_MEMORY and android app crashing using AR Foundation?

I was trying to load images at run time into the Image Library from many image links for my AR project.While testing the below code my android app crashed with following errors

Code (CSharp):

1.  
2. using System.Collections;
3. using System.Collections.Generic;
4. using UnityEngine;
5. using UnityEngine.XR.ARFoundation;
6. using UnityEngine.XR.ARSubsystems;
7. using UnityEngine.UI;
8. using UnityEngine.Networking;
9. using System.IO;
10.  
11. public class DynamicImageLib : MonoBehaviour
12. {
13. public ARTrackedImageManager aRTrackedImageManager;
14. public GameObject mTrackedImagePrefab;
15. public Texture2D imgToTexture2d;
16. public MutableRuntimeReferenceImageLibrary myRuntimeImageLibrary;
17. public Text msgText;
18. public Text numText;
19. bool isRunning = false;
20. List<string> allURLs = new List<string> { "https://i.picsum.photos/id/0/5616/3744.jpg", "https://i.picsum.photos/id/1001/5616/3744.jpg",
21. "https://i.picsum.photos/id/1000/5626/3635.jpg","https://i.picsum.photos/id/1004/5616/3744.jpg","https://i.picsum.photos/id/1005/5760/3840.jpg",
22. "https://i.picsum.photos/id/1006/3000/2000.jpg","https://i.picsum.photos/id/1008/5616/3744.jpg","https://i.picsum.photos/id/1009/5000/7502.jpg",
23. "https://i.picsum.photos/id/101/2621/1747.jpg","https://i.picsum.photos/id/1010/5184/3456.jpg","https://i.picsum.photos/id/1011/5472/3648.jpg",
24. "https://i.picsum.photos/id/1012/3973/2639.jpg","https://i.picsum.photos/id/1013/4256/2832.jpg","https://i.picsum.photos/id/1014/6016/4000.jpg",
25. "https://i.picsum.photos/id/1015/6000/4000.jpg","https://i.picsum.photos/id/1016/3844/2563.jpg","https://i.picsum.photos/id/1018/3914/2935.jpg",
26. "https://i.picsum.photos/id/1019/5472/3648.jpg","https://i.picsum.photos/id/102/4320/3240.jpg","https://i.picsum.photos/id/1020/4288/2848.jpg",
27. "https://i.picsum.photos/id/1021/2048/1206.jpg","https://i.picsum.photos/id/1022/6000/3376.jpg","https://i.picsum.photos/id/1023/3955/2094.jpg",
28. "https://i.picsum.photos/id/1024/1920/1280.jpg","https://i.picsum.photos/id/1025/4951/3301.jpg"};
29.  
30. void Awake()
31. {
32.     Screen.sleepTimeout = SleepTimeout.NeverSleep;
33.     aRTrackedImageManager = gameObject.AddComponent<ARTrackedImageManager>();
34.     aRTrackedImageManager.enabled = false;
35.     myRuntimeImageLibrary = aRTrackedImageManager.CreateRuntimeLibrary() as MutableRuntimeReferenceImageLibrary;
36.     aRTrackedImageManager.maxNumberOfMovingImages = 1;
37.     aRTrackedImageManager.trackedImagePrefab = mTrackedImagePrefab;
38.     aRTrackedImageManager.trackedImagesChanged += OnImageChanged;
39. }
40. // Start is called before the first frame update
41. void Start()
42. {
43.     Debug.Log("Intially Running................................................");
44.     // StartCoroutine(AddImageTrackerByUrl("https://upload.wikimedia.org/wikipedia/commons/9/97/The_Earth_seen_from_Apollo_17.jpg"));
45.  
46.     //StartCoroutine(AddImageTrackerByUrl("https://upload.wikimedia.org/wikipedia/commons/9/97/The_Earth_seen_from_Apollo_17.jpg[/URL]"));
47.     //StartCoroutine(AddImageTrackerByUrl("https://i.picsum.photos/id/0/5616/3744.jpg"));
48.     //StartCoroutine(AddImageTrackerByUrl("https://i.picsum.photos/id/1001/5616/3744.jpg"));
49.  
50.  
51.     StartCoroutine(AddImageTrackerByUrl());
52.  
53.  
54. }
55.  
56. // Update is called once per frame
57. void Update()
58. {
59.  
60. }
61.  
62. public void OnImageChanged(ARTrackedImagesChangedEventArgs args)
63. {
64.     foreach (var trackedImage in args.added)
65.     {
66.         Debug.Log(trackedImage.name);
67.         msgText.text = trackedImage.name;
68.     }
69. }
70.  
71. IEnumerator AddImageTrackerByUrl()
72. {
73.  
74.         isRunning = true;
75.         aRTrackedImageManager.enabled = false;
76.         if (aRTrackedImageManager.descriptor.supportsMutableLibrary)
77.         {
78.            foreach (var link in allURLs)
79.            {
80.  
81.  
82.  
83.  
84.                 using (UnityWebRequest webRequest = UnityWebRequestTexture.GetTexture(link))
85.                 {
86.  
87.  
88.                     yield return webRequest.SendWebRequest();
89.  
90.                     if (webRequest.isNetworkError || webRequest.isHttpError)
91.                     {
92.                         Debug.Log("Error is " + webRequest.error);
93.                     }
94.                     else
95.                     {
96.  
97.                         imgToTexture2d = DownloadHandlerTexture.GetContent(webRequest);
98.  
99.                         Unity.Jobs.JobHandle jobHandle = myRuntimeImageLibrary.ScheduleAddImageJob(imgToTexture2d, Path.GetFileName(link), 0.2f);
100.                         jobHandle.Complete();
101.  
102.                         if (myRuntimeImageLibrary != null)
103.                         {
104.                             Debug.Log("Image Library Count: " + myRuntimeImageLibrary.count);
105.                             numText.text = myRuntimeImageLibrary.count.ToString();
106.                             aRTrackedImageManager.referenceLibrary = myRuntimeImageLibrary;
107.  
108.  
109.                         }
110.                         webRequest.downloadHandler.Dispose();
111.                         imgToTexture2d = null;
112.                         aRTrackedImageManager.enabled = true;
113.                     }
114.  
115.  
116.                 }
117.         }
118.  
119.  
120.     }
121.  

The error from log is as follows

Error Unity OPENGL NATIVE PLUG-IN ERROR: GL_OUT_OF_MEMORY: Not enough memory left to execute command

Error Unity (Filename: ./Runtime/GfxDevice/opengles/GfxDeviceGLES.cpp Line: 353)

Error Unity OPENGL NATIVE PLUG-IN ERROR: GL_OUT_OF_MEMORY: Not enough memory left to execute command

Error Unity (Filename: ./Runtime/GfxDevice/opengles/GfxDeviceGLES.cpp Line: 353)

Error Unity Could not allocate memory: System out of memory!

Error Unity Trying to allocate: 72192000B with 16 alignment. MemoryLabel: NativeArray

Error Unity Allocation happened at: Line:59 in

Error Unity Memory overview

Error Unity [ ALLOC_TEMP_THREAD ] used: 32768B | peak: 0B | reserved: 2752512B

Error Unity [ ALLOC_TEMP_JOB_1_FRAME ] used: 0B | peak: 0B | reserved: 3145728B

Error Unity [ ALLOC_TEMP_JOB_2_FRAMES ] used: 0B | peak: 0B | reserved: 1048576B

Error Unity [ ALLOC_TEMP_JOB_4_FRAMES ] used: 0B | peak: 0B | reserved: 2097152B

Error Unity [ ALLOC_TEMP_JOB_ASYNC ] used: 4326745B | peak: 0B | reserved: 7340032B

Error Unity [ ALLOC_DEFAULT ] used: 15634711B | peak: 165212737B | reserved: 15974431B

Error Unity [ ALLOC_GAMEOBJECT ] used: 820820B | peak: 820952B | reserved: 823005B

Error Unity [ ALLOC_GFX ] used: 777844463B | peak: 777844463B | reserved: 777845964B

Error Unity (Filename: Line: 1449)

It initially downloads a few images and add to library and crashes.Is it because the downloaded images are high in size? I tried to free up size by using webrequest datahandler dispose method but no effect.Later I used small sized images i added around 39 of them and it downloaded only 36 missed some pics.How to solve memory related issues.Any guidelines?

 

I am also getting similar issue after I was able to implement runtime reference library implementation. It runs for sometime and then crashes on Motorola device. Moto Z2