How to avoid Cache restore time outs - caching

Question

I do a cache of the maven repository using Cache#2 to prevent additional downloads especially since Maven Central may yield zero byte files.
However, I am getting events such as this on my build log and when it occurs it significantly slows down the build step.
2020-02-14T03:24:14.9261543Z Information, Downloaded 340.2 MB out of 447.6 MB (76%).
2020-02-14T03:24:18.3130567Z Warning, [https://37bvsblobprodcus311.blob.core.windows.net/db184fb09aee8f4ae39869ebeab81ab1ad/7FE2B04FAB9DCB08C78F137CCA2FDA2D5E37B05B5DBCA1D7EDD23F7DB5D580B301?sv=2017-04-17&sr=b&sig=mZZ1kK00Gc2cg5m6dyRB3XUYVB40dxJkvBMbXW4D3cM%3D&spr=https&se=2020-02-15T03%3A29%3A57Z&sp=r&rscl=x-e2eid-c561122c-76784a8c-be2cb59f-c79091dc-session-eacd1913-b0014305-a33f0081-46cabc28] Try 1/5, non-retryable exception caught. Throwing. Details:
2020-02-14T03:24:18.3131821Z Task was requested to be canceled. System.Threading.Tasks.TaskCanceledException: A task was canceled.
2020-02-14T03:24:18.3132112Z at System.IO.Stream.CopyToAsyncInternal(Stream destination, Int32 bufferSize, CancellationToken cancellationToken)
2020-02-14T03:24:18.3132355Z at System.Net.Http.NoWriteNoSeekStreamContent.<>c.<SerializeToStreamAsync>b__4_0(Task t, Object s)
2020-02-14T03:24:18.3132630Z at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
2020-02-14T03:24:18.3133177Z --- End of stack trace from previous location where exception was thrown ---
2020-02-14T03:24:18.3133445Z at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)
2020-02-14T03:24:18.3133903Z --- End of stack trace from previous location where exception was thrown ---
2020-02-14T03:24:18.3134179Z at System.Net.Http.HttpContent.LoadIntoBufferAsyncCore(Task serializeToStreamTask, MemoryStream tempBuffer)
2020-02-14T03:24:18.3134413Z at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
2020-02-14T03:24:18.3134691Z at Microsoft.VisualStudio.Services.Common.TaskCancellationExtensions.EnforceCancellation[TResult](Task`1 task, CancellationToken cancellationToken, Func`1 makeMessage, String file, String member, Int32 line)
2020-02-14T03:24:18.3134970Z at Microsoft.VisualStudio.Services.BlobStore.WebApi.DedupStoreHttpClient.<>c__DisplayClass57_0.<<GetRedirectResponseAsync>b__0>d.MoveNext()
2020-02-14T03:24:18.3135439Z --- End of stack trace from previous location where exception was thrown ---
2020-02-14T03:24:18.3135708Z at Microsoft.VisualStudio.Services.Content.Common.AsyncHttpRetryHelper`1.InvokeAsync(CancellationToken cancellationToken)
2020-02-14T03:24:18.3150625Z Warning, [https://37bvsblobprodcus311.blob.core.windows.net/db184fb09aee8f4ae39869ebeab81ab1ad/7FE2B04FAB9DCB08C78F137CCA2FDA2D5E37B05B5DBCA1D7EDD23F7DB5D580B301?sv=2017-04-17&sr=b&sig=mZZ1kK00Gc2cg5m6dyRB3XUYVB40dxJkvBMbXW4D3cM%3D&spr=https&se=2020-02-15T03%3A29%3A57Z&sp=r&rscl=x-e2eid-c561122c-76784a8c-be2cb59f-c79091dc-session-eacd1913-b0014305-a33f0081-46cabc28] Try 1/5, retryable exception caught. Retrying in 00:00:01. System.Threading.Tasks.TaskCanceledException: A task was canceled.
2020-02-14T03:24:18.3151412Z at System.IO.Stream.CopyToAsyncInternal(Stream destination, Int32 bufferSize, CancellationToken cancellationToken)
2020-02-14T03:24:18.3151697Z at System.Net.Http.NoWriteNoSeekStreamContent.<>c.<SerializeToStreamAsync>b__4_0(Task t, Object s)
2020-02-14T03:24:18.3151962Z at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
2020-02-14T03:24:18.3152497Z --- End of stack trace from previous location where exception was thrown ---
2020-02-14T03:24:18.3152771Z at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)
2020-02-14T03:24:18.3153248Z --- End of stack trace from previous location where exception was thrown ---
2020-02-14T03:24:18.3153496Z at System.Net.Http.HttpContent.LoadIntoBufferAsyncCore(Task serializeToStreamTask, MemoryStream tempBuffer)
2020-02-14T03:24:18.3153749Z at System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)
2020-02-14T03:24:18.3154100Z at Microsoft.VisualStudio.Services.Common.TaskCancellationExtensions.EnforceCancellation[TResult](Task`1 task, CancellationToken cancellationToken, Func`1 makeMessage, String file, String member, Int32 line)
2020-02-14T03:24:18.3154606Z at Microsoft.VisualStudio.Services.BlobStore.WebApi.DedupStoreHttpClient.<>c__DisplayClass57_0.<<GetRedirectResponseAsync>b__0>d.MoveNext()
2020-02-14T03:24:18.3155603Z --- End of stack trace from previous location where exception was thrown ---
2020-02-14T03:24:18.3155739Z at Microsoft.VisualStudio.Services.Content.Common.AsyncHttpRetryHelper`1.InvokeAsync(CancellationToken cancellationToken)
2020-02-14T03:24:18.3155929Z at Microsoft.VisualStudio.Services.BlobStore.WebApi.DedupStoreHttpClient.<>c__DisplayClass60_0.<<HandleRedirectAsync>b__0>d.MoveNext()
2020-02-14T03:24:18.3159451Z --- End of stack trace from previous location where exception was thrown ---
2020-02-14T03:24:18.3159789Z at Microsoft.VisualStudio.Services.Content.Common.AsyncHttpRetryHelper`1.InvokeAsync(CancellationToken cancellationToken)
2020-02-14T03:24:19.9319176Z Information, Downloaded 340.2 MB out of 447.6 MB (76%).
2020-02-14T03:24:24.9323050Z Information, Downloaded 352.6 MB out of 447.6 MB (79%).
Is there any way of avoiding that? I have also checked https://status.dev.azure.com/ and there is no indication of any issues with it. These are with the paid Azure Devops agent pool not a private agent pool.

Answer 1

There is a similar issue that has been open here. You can join in the discussion of this thread or open new issue for above case.
you can try the workaround of using continueOnError: true on the cache task to prevent it from failing the build.
- task: Cache#2
inputs:
key: 'npm | "$(Agent.OS)" | package-lock.json'
restoreKeys: |
npm | "$(Agent.OS)"
npm
path: $(npm_config_cache)
displayName: Cache npm
continueOnError: true