RFR: CODETOOLS-7903019: jcstress: Very long exceptions break the VM data streams

[Aleksey Shipilev]

See details in the bug.

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Commit messages:
 - More precise fix
 - Crude attempt at fixing

Changes: https://git.openjdk.java.net/jcstress/pull/94/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jcstress&pr=94&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7903019
  Stats: 45 lines in 6 files changed: 9 ins; 24 del; 12 mod
  Patch: https://git.openjdk.java.net/jcstress/pull/94.diff
  Fetch: git fetch https://git.openjdk.java.net/jcstress pull/94/head:pull/94

PR: https://git.openjdk.java.net/jcstress/pull/94