fix(node): [NET-1377] Operator stops inspecting after Polygon RPC timeout

[teogeb]

Error

IfOperator.fetchRedundancyFactor() call throws an error during inspectRandomNode task, the task is unable to complete. The scheduler won't start subsequent inspections as the frozen task is still pending.

This kind of error is shown in logs:

INFO [2024-11-16T23:42:11.049] (inspectOverTime          ): Inspecting target {"traceId":"iSu6S5","attemptNo":1,"target":{"sponsorshipAddress":"0x335370713cea4321330cbcb5f2e2b87fe6a33e7c","operatorAddress":"0x22f694c92b74a31dc0af06cff53586ac84b2c9fc","streamPart":"streamr.eth/demos/radio#0"}}
WARN [2024-11-16T23:42:16.110] (inspectOverTime          ): Error encountered {"traceId":"iSu6S5"}
    err: {
      "type": "Error",
      "message": "Error while executing contract call \"operator.metadata\", code=TIMEOUT",
      "stack":
          Error: Error while executing contract call "operator.metadata", code=TIMEOUT
              at withErrorHandling (/home/streamr/network/packages/sdk/dist/src/contracts/contract.js:52:30)
              at async Object.fn [as metadata] (/home/streamr/network/packages/sdk/dist/src/contracts/contract.js:62:29)
              at async Operator.fetchRedundancyFactor (/home/streamr/network/packages/sdk/dist/src/contracts/Operator.js:407:34)
              at async InspectionOverTimeTask.findNodesForTargetGivenFleetState [as findNodesForTargetGivenFleetStateFn] (/home/streamr/network/packages/node/dist/src/plugins/operator/inspectionUtils.js:66:31)
              at async InspectionOverTimeTask.run (/home/streamr/network/packages/node/dist/src/plugins/operator/inspectOverTime.js:96:43)
      "reason": {
        "type": "Error",
        "message": "request timeout (code=TIMEOUT, version=6.13.1)",
        "stack":
            Error: request timeout (code=TIMEOUT, version=6.13.1)
                at makeError (/home/streamr/network/node_modules/ethers/lib.commonjs/utils/errors.js:129:21)
                at ClientRequest.<anonymous> (/home/streamr/network/node_modules/ethers/lib.commonjs/utils/geturl.js:59:50)
                at ClientRequest.emit (node:events:519:28)
                at TLSSocket.emitRequestTimeout (node:_http_client:856:9)
                at Object.onceWrapper (node:events:633:28)
                at TLSSocket.emit (node:events:531:35)
                at Socket._onTimeout (node:net:591:8)
                at listOnTimeout (node:internal/timers:581:17)
                at process.processTimers (node:internal/timers:519:7)
        "code": "TIMEOUT",
        "shortMessage": "request timeout"
      }

Fix

Added doneGate.open() call to InspectionOverTimeTask#destroy()

• the error handler created in start() calls the destroy() method
• as the gate is open, the await task.waitUntilPassOrDone() at line 35 is no longer blocked

[linear]

NET-1377 Operator stops inspecting after Polygon RPC timeout