parallel-abuse.groovy

// Pipeline script that will exhibit painful behavior if you handle parallels inefficiently
// Or don't ensure we only visit each node once when iterating.  Generates ~1100 nodes.
// If we don't avoid visiting nodes multiple times, walking through this will require ~20*150*20*3*3 visits = ~540000
stage ('before') {
    for (int i=0; i<150; i++) {
        echo "running the $i step before parallel here"
    }
}

int branchCount = 20;
int branchSteps = 10; 

def branches = [:]
for (int i=0; i<branchCount; i++) {
    branches["branch-$i"] = {
        for (int j=0; j<branchSteps; j++) {
            echo "Running branch $i step $j here"   
        }
        parallel 'anotherbranch': {echo 'nested parallel'}, 'more':{echo 'nested parallel'}, 'andmore': {echo 'nested parallel'}
    }
}
parallel branches
parallel branches

stage ('canfail') {
    // boolean randomizer = nextBoolean()
    // echo "Randomizer set to $randomizer"
    // checkpoint 'before-fail'  // Comment back in to test checkpoint restore
    if (!randomizer) {
        error("Random failure")
    } else {
        echo 'random pass'
    }
}

stage ('after') {
    for (int i=0; i<30; i++) {
        echo "running the $i step here"
    }
}