Will it be an issue in foreach -Parallel under my scenario.

Steps to reproduce

$sip= 25..135 | foreach {"10.10.10.$_"}
$ship | foreach -Parallel {if (Test-Connection -ComputerName $_ -Quiet -Count 2) {Add-Content -Path .\online.txt -Value $_} } -ThrottleLimit 10  -Verbose

Expected behavior

Every IP address that response to ICMP request will be added to online.txt

Actual behavior

The whole script runs without any error. But just wonder:

Script will test 10 computers at the same time. If the 10 testing finish at the same time, and try to add the IP address to online.txt at the same time, seems it will be a conflict, as 10 sessions try to access the same file, will it causes some sessions give up the addition of IP address.

Environment data

Name                           Value
----                           -----
PSVersion                      7.1.0
PSEdition                      Core
GitCommitId                    7.1.0
OS                             Microsoft Windows 6.3.9600
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[tlsalex]

thanks ,now I do that in bellow way, hope PS team improve it more. $ship | foreach -Parallel {if (Test-Connection -ComputerName $_ -Quiet -Count 2 -Delay 1) {$_}} -ThrottleLimit 10 | tee -Path .\2online.txt

[msftbot[bot]]

This issue has been marked as duplicate and has not had any activity for 1 day. It has been closed for housekeeping purposes.