ephemeral-validator v0.8.2 exits immediately (code 0) with no output against local solana-test-validator

[Allen-Saji]

Description

The ephemeral-validator binary from @magicblock-labs/ephemeral-validator@0.8.2 (npm) exits immediately with exit code 0 and produces zero output (stdout/stderr) when attempting to connect to a local solana-test-validator started via mb-test-validator.

Environment

• OS: Ubuntu 24.04 (Linux 6.8.0-101-generic, x86_64)
• Node: v23.11.0
• @magicblock-labs/ephemeral-validator: 0.8.2
• solana-cli: 2.3.13
• anchor-cli: 0.32.1

Steps to Reproduce

1. Start the base layer validator:

mb-test-validator --reset
# Confirms running on :8899 with delegation programs loaded

2. Run the ephemeral validator:

ephemeral-validator --remotes localhost --lifecycle ephemeral -l 0.0.0.0:7799 --reset
# Exits immediately, code 0, no output

What I tried

• Different --remotes formats: localhost, http://localhost:8899, explicit HTTP + WS pair
• TOML config file instead of CLI args
• RUST_LOG=trace RUST_BACKTRACE=full -- still zero stdout/stderr
• Explicit --storage directory
• Running the platform binary directly (ephemeral-validator-linux-x64/bin/ephemeral-validator)

All attempts produce the same result: the process exits with code 0 and no output.

Observations from strace

Running under strace shows the binary does start up briefly:

• Initializes RocksDB, creates storage files (rocksdb/, accountsdb/, sqlite files, keypair files)
• Binds to port 9000 momentarily
• Then exits cleanly

--version works fine and returns magicblock-config 0.8.2.

Expected Behavior

The ephemeral validator should stay running, bind to the specified listen port (7799), and connect to the local solana-test-validator as its base layer.