I worked on this some time ago, so I'd be happy to have a look at it.
@hokiegeek2 - does it fail at any job or specific jobs?

@onthebridgetonowhere Cool! Basically, no job graphs display in the UI in my experience

I had a look at it but I cannot reproduce the problem. Can you please provide more info about your configuration, version, build commit?
The first thing I'd try is to update to latest commit on main branch if possible.

Here's what I've done that works for me:

• update to latest commit - 22029020
• cd ballista/scheduler && cargo run RUST_LOG=info ballista-scheduler
• cd ballista/executor && cargo run RUST_LOG=info ballista-executor
• cd ballista/scheduler/ui && yarn start
• cd examples && cargo run --release --bin sql

@onthebridgetonowhere cool, okay, I'll pull and build from that commit and see if I can reproduce your results

@hokiegeek2 sounds good, let us know how it goes.

Hi all, while working on #957 I faced the same issue, here's how to reproduce it:

1. In the API handler, get_job_svg_graph function replace .map_err(|_| warp::reject()) with .map_err(|err| { info!("Issue: {:?}", err); warp::reject()})
   https://github.com/apache/arrow-ballista/blob/9903ab27f121f16717a70de7a30f643c4c45dd34/ballista/scheduler/src/api/handlers.rs#L343-L348
2. Launch scheduler and executor
3. Submit a query, e.g. the standalone-sql.rs but with a call to remote:

   use ballista::prelude::{BallistaConfig, BallistaContext, Result};
   use ballista_examples::test_util;
   use datafusion::execution::options::ParquetReadOptions;
   
   #[tokio::main]
   async fn main() -> Result<()> {
       let config = BallistaConfig::builder()
           .set("ballista.shuffle.partitions", "1")
           .build()?;
   
       let ctx = BallistaContext::remote("localhost", 50050, &config).await?;
   
       let testdata = test_util::examples_test_data();
   
       // register parquet file with the execution context
       ctx.register_parquet(
           "test",
           &format!("{testdata}/alltypes_plain.parquet"),
           ParquetReadOptions::default(),
       )
       .await?;
   
       let df = ctx.sql("select count(1) from test").await?;
   
       df.show().await?;
       Ok(())
   }

4. Wait until query is executed
5. Look up the job ID, e.g. GET request to http://localhost:50050/api/jobs
6. Call http://localhost:50050/api/job/{job_id}/dot_svg with the retrieved job_id (e.g. http://localhost:50050/api/job/bvppZ4r/dot_svg)
7. Go to the terminal of the scheduler and monitor the logs - I got the following error:

   2024-01-25T22:28:24.800607Z  INFO tokio-runtime-worker ThreadId(19) ballista_scheduler::api::handlers: Issue: Error { kind: NotFound, message: "program not found" }
   

Hope that helps to narrow it down!

Ok I think I stumbled over the solution for this issue: The graphviz-rust library requires additionally the graphviz CLI to be installed:

Source: Documentation

On Windows these were the steps:

1. winget install graphviz
2. Add C:\Program Files\Graphviz\bin to PATH
3. Validate the CLI is installed with dot -V
4. Restart ballista scheduler